subject:(piezoelectric)

Cape Peninsula University of Technology

1. Mtawa, Alexander Nikwanduka. Influence of geometry and material properties on the optimum performance of the C-shape piezo-composite actuator .

Degree: 2008, Cape Peninsula University of Technology

URL: http://etd.cput.ac.za/handle/20.500.11838/1301

► In recent years, due to rapid advances in technology there has been an increasingly high demand for large displacement and large force, precise positioning, fast… (more)

▼ In recent years, due to rapid advances in technology there has been an increasingly high demand for large displacement and large force, precise positioning, fast response, low power consuming miniature piezoelectric actuators. In certain smart structure applications, the use of curved piezoelectric actuators is necessary. The present work extends the earlier investigations on the C- shape actuator by providing a detailed investigation on the influence of geometric and material properties of the individual layers of the C-shape piezocomposite for its optimal performance as an actuator. Analytical models have. been used to optimize the geometry of the actuator. Experimental and finite element analyses (using general purpose finite element software i.e. CoventerWare and MSC. Marc) have been used for validation. The present work has established that, by maintaining the thickness of the substrate and piezoceramic layers constant; changing the external radius, for example increasing it, the stiffness of the structure decreases and thus yielding large displacement This has a negative effect on the force produced by the actuator. With fixed thickness of the substrate and varying the thickness of the piezoceramic (for fixed external radius) the result is as follows: Increasing the thickness of the piezoceramic layer has the effect of decreasing the displacement while the force increases. With fixed PZT thickness as well as the external radius, varying the substrate thickness has the following effect: As the thickness of the substrate increases the displacement increases reaching a maximum. Subsequent increase in the thickness of the substrate the displacement is reduced. The force continues increasing at least for the ratios up to 1.0, further increase of the substrate, subsequent decrease of force is also noted. In addition to changing the thickness of the substrate, the choice of different material for the substrate has the following effect: For substrate/PZT ratios of up to 0.6. an actuator with substrate material having higher elastic modulus will produce larger displacement while for ratios beyond this ratio the situation is reversed. The causes for this kind of behaviour have been addressed. In all cases both force and displacement are found to be directly proportional to applied voltage.

Subjects/Keywords: Piezoelectric materials; Piezoelectric ceramics; Geometry

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APA (6^th Edition):

Mtawa, A. N. (2008). Influence of geometry and material properties on the optimum performance of the C-shape piezo-composite actuator . (Thesis). Cape Peninsula University of Technology. Retrieved from http://etd.cput.ac.za/handle/20.500.11838/1301

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Mtawa, Alexander Nikwanduka. “Influence of geometry and material properties on the optimum performance of the C-shape piezo-composite actuator .” 2008. Thesis, Cape Peninsula University of Technology. Accessed February 27, 2020. http://etd.cput.ac.za/handle/20.500.11838/1301.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Mtawa, Alexander Nikwanduka. “Influence of geometry and material properties on the optimum performance of the C-shape piezo-composite actuator .” 2008. Web. 27 Feb 2020.

Vancouver:

Mtawa AN. Influence of geometry and material properties on the optimum performance of the C-shape piezo-composite actuator . [Internet] [Thesis]. Cape Peninsula University of Technology; 2008. [cited 2020 Feb 27]. Available from: http://etd.cput.ac.za/handle/20.500.11838/1301.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Mtawa AN. Influence of geometry and material properties on the optimum performance of the C-shape piezo-composite actuator . [Thesis]. Cape Peninsula University of Technology; 2008. Available from: http://etd.cput.ac.za/handle/20.500.11838/1301

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Utah

2. Tschaggeny, Charles. Piezoelectric direct drive three axis high precision gimbal (Hierax).

Degree: MS;, Mechanical Engineering;, 2007, University of Utah

URL: http://content.lib.utah.edu/cdm/singleitem/collection/etd2/id/642/rec/888

► This paper presents a novel three axis gimbal (Hierax) actuated by linear piezoelectric motors. The Hierax will be used as part of a ground-based tracking… (more)

Subjects/Keywords: Piezoelectric devices

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APA (6^th Edition):

Tschaggeny, C. (2007). Piezoelectric direct drive three axis high precision gimbal (Hierax). (Masters Thesis). University of Utah. Retrieved from http://content.lib.utah.edu/cdm/singleitem/collection/etd2/id/642/rec/888

Chicago Manual of Style (16^th Edition):

Tschaggeny, Charles. “Piezoelectric direct drive three axis high precision gimbal (Hierax).” 2007. Masters Thesis, University of Utah. Accessed February 27, 2020. http://content.lib.utah.edu/cdm/singleitem/collection/etd2/id/642/rec/888.

MLA Handbook (7^th Edition):

Tschaggeny, Charles. “Piezoelectric direct drive three axis high precision gimbal (Hierax).” 2007. Web. 27 Feb 2020.

Vancouver:

Tschaggeny C. Piezoelectric direct drive three axis high precision gimbal (Hierax). [Internet] [Masters thesis]. University of Utah; 2007. [cited 2020 Feb 27]. Available from: http://content.lib.utah.edu/cdm/singleitem/collection/etd2/id/642/rec/888.

Council of Science Editors:

Tschaggeny C. Piezoelectric direct drive three axis high precision gimbal (Hierax). [Masters Thesis]. University of Utah; 2007. Available from: http://content.lib.utah.edu/cdm/singleitem/collection/etd2/id/642/rec/888

NSYSU

3. Hung, Ching-chieh. Stress Analysis of Piezoelectric Circular Plates.

Degree: Master, Mechanical and Electro-Mechanical Engineering, 2009, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0212109-161229

► A finite element is formulated to analyze the deflection and stresses of circular and annular piezoelectric plates underloading of applied electrical potential. The element is… (more)

Subjects/Keywords: stress; piezoelectric

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APA (6^th Edition):

Hung, C. (2009). Stress Analysis of Piezoelectric Circular Plates. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0212109-161229

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Hung, Ching-chieh. “Stress Analysis of Piezoelectric Circular Plates.” 2009. Thesis, NSYSU. Accessed February 27, 2020. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0212109-161229.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Hung, Ching-chieh. “Stress Analysis of Piezoelectric Circular Plates.” 2009. Web. 27 Feb 2020.

Vancouver:

Hung C. Stress Analysis of Piezoelectric Circular Plates. [Internet] [Thesis]. NSYSU; 2009. [cited 2020 Feb 27]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0212109-161229.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Hung C. Stress Analysis of Piezoelectric Circular Plates. [Thesis]. NSYSU; 2009. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0212109-161229

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Ryerson University

4. Ahmed, Rummaan, Syed. Performance of piezoceramic sensors:.

Degree: 2013, Ryerson University

URL: https://digital.library.ryerson.ca/islandora/object/RULA%3A2607

► This study is in continuation of the previous research conducted at Ryerson University to develop a model for active monitoring of reinforced concrete members using… (more)

Subjects/Keywords: Piezoelectric ceramics; Piezoelectric ceramics – -; Detectors; Detectors – -; Piezoelectric devices; Piezoelectric devices – -

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APA (6^th Edition):

Ahmed, Rummaan, S. (2013). Performance of piezoceramic sensors:. (Thesis). Ryerson University. Retrieved from https://digital.library.ryerson.ca/islandora/object/RULA%3A2607

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Ahmed, Rummaan, Syed. “Performance of piezoceramic sensors:.” 2013. Thesis, Ryerson University. Accessed February 27, 2020. https://digital.library.ryerson.ca/islandora/object/RULA%3A2607.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Ahmed, Rummaan, Syed. “Performance of piezoceramic sensors:.” 2013. Web. 27 Feb 2020.

Vancouver:

Ahmed, Rummaan S. Performance of piezoceramic sensors:. [Internet] [Thesis]. Ryerson University; 2013. [cited 2020 Feb 27]. Available from: https://digital.library.ryerson.ca/islandora/object/RULA%3A2607.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Ahmed, Rummaan S. Performance of piezoceramic sensors:. [Thesis]. Ryerson University; 2013. Available from: https://digital.library.ryerson.ca/islandora/object/RULA%3A2607

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Queens University

5. Hairsine, Kristopher Ryan. The Design of a Scanning Tunneling Microscope for Electroluminescence Studies .

Degree: Physics, Engineering Physics and Astronomy, 2015, Queens University

URL: http://hdl.handle.net/1974/13897

► A conventional scanning tunneling microscope (STM) provides topographical and tunneling spectra information of atomic structures. However, the extremely small lateral dimension of the tunneling filament… (more)

Subjects/Keywords: STM; Piezoelectric

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APA (6^th Edition):

Hairsine, K. R. (2015). The Design of a Scanning Tunneling Microscope for Electroluminescence Studies . (Thesis). Queens University. Retrieved from http://hdl.handle.net/1974/13897

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Hairsine, Kristopher Ryan. “The Design of a Scanning Tunneling Microscope for Electroluminescence Studies .” 2015. Thesis, Queens University. Accessed February 27, 2020. http://hdl.handle.net/1974/13897.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Hairsine, Kristopher Ryan. “The Design of a Scanning Tunneling Microscope for Electroluminescence Studies .” 2015. Web. 27 Feb 2020.

Vancouver:

Hairsine KR. The Design of a Scanning Tunneling Microscope for Electroluminescence Studies . [Internet] [Thesis]. Queens University; 2015. [cited 2020 Feb 27]. Available from: http://hdl.handle.net/1974/13897.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Hairsine KR. The Design of a Scanning Tunneling Microscope for Electroluminescence Studies . [Thesis]. Queens University; 2015. Available from: http://hdl.handle.net/1974/13897

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Rutgers University

6. Du, Wanlin. The influence of processing parameters and material composition on the piezoelectric, dielec- tric and mechanical properties of dome-shaped pie-zoelectric actuators.

Degree: PhD, Mechanical and Aerospace Engineering, 2017, Rutgers University

URL: https://rucore.libraries.rutgers.edu/rutgers-lib/55461/

►

Thick film (Pb ZrxTi1-x O3(0≤x≤1))-Epoxy) structures and three-phase (lead zirconate titanate ii displacements. To study the influence of the curing conditions, after the fabrication of… (more)

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Thick film (Pb ZrxTi1-x O3(0≤x≤1))-Epoxy) structures and three-phase (lead zirconate titanate ii displacements. To study the influence of the curing conditions, after the fabrication of the dome-shaped devices using datum fabrication methods, four different curing conditions were employed: curing on the hotplate at 75°C with air, curing in the vacuum chamber at room temperature, curing with the air at room temperature and curing in the furnace at 75°C with air. The influences of the mechanical stirring were also studied associated with all four aforementioned curing conditions. The timing of the poling step and the duration were also studied, in this study the poling process has happened simultaneously with the curing process during the first 0.5h, 1h and 2h. After the initial curing, the samples would have finished the whole curing time with the optimized curing conditions from previous study. The study of the material composition such adding the MWCNTs has also been carried out in this work. The three-phase (PZT-Epoxy-MWCNTs) 0-3-0 dome shaped composite devices were initially fabricated with the datum fabrication procedure to nar- row down the optimized volume fractions of the MWCNTs in the composite. And the updated method was employed to further study the optimized volume fractions of the MWCNTs. The volume fraction of PZT was fixed at 0.6, and the highest values for the longi- tudinal piezoelectric coefficient (@110Hz), effective dielectric constant (@2kHz), and dielectric loss (@2kHz), were 12.507 pC/N, 90.72 and 0.00185 respectively for the MWCNTS volume fraction equal to 0.13. The piezoelectric strain coefficient d33 for this dome structure was improved 13.7% compared to that previously reported value for a composite PZT-epoxy dome structure of similar structure and composition but have fab- ricated through the datum procedures. The sample morphology was examined with the aid of scanning electron microscopy (SEM) images and the material distribution was iii iii studied by energy dispersive x-ray spectroscopy (EDS). All samples were Corona poled allowed for higher poling voltages (45 kV/mm). It has been observed that adding the magnetic stirring step, cure initially with external electric field for 1h, and finished the whole curing in the furnace offered most optimized properties, parametricallywise. Piezoelectric strain coefficients and capacitance were measured @110Hz by Piezometer, and displacement of certain volume fractions of PZT were studied by Keyence interferometer. To better examine the polarization-electric field relation, P-E hysteresis loop were measured. Other dielectric properties such as conductance, resistance, and impedance spec- transverse increasing frequency were obtained by Hp impedance analyzer within the frequency range from 2kHz to 20Mhz. Investigation of composite structures such as these may lead to development of actuators with enhanced displacement and sensors with bet- ter sensitivity.

Advisors/Committee Members: Cook-Chennault, Kimberly (chair), Cuitino, Alberto (internal member), Shojaei-Zadeh, Shahab (internal member), Berhan, Lesley (outside member), School of Graduate Studies.

Subjects/Keywords: Piezoelectric devices

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Du, W. (2017). The influence of processing parameters and material composition on the piezoelectric, dielec- tric and mechanical properties of dome-shaped pie-zoelectric actuators. (Doctoral Dissertation). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/55461/

Chicago Manual of Style (16^th Edition):

Du, Wanlin. “The influence of processing parameters and material composition on the piezoelectric, dielec- tric and mechanical properties of dome-shaped pie-zoelectric actuators.” 2017. Doctoral Dissertation, Rutgers University. Accessed February 27, 2020. https://rucore.libraries.rutgers.edu/rutgers-lib/55461/.

MLA Handbook (7^th Edition):

Du, Wanlin. “The influence of processing parameters and material composition on the piezoelectric, dielec- tric and mechanical properties of dome-shaped pie-zoelectric actuators.” 2017. Web. 27 Feb 2020.

Vancouver:

Du W. The influence of processing parameters and material composition on the piezoelectric, dielec- tric and mechanical properties of dome-shaped pie-zoelectric actuators. [Internet] [Doctoral dissertation]. Rutgers University; 2017. [cited 2020 Feb 27]. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/55461/.

Council of Science Editors:

Du W. The influence of processing parameters and material composition on the piezoelectric, dielec- tric and mechanical properties of dome-shaped pie-zoelectric actuators. [Doctoral Dissertation]. Rutgers University; 2017. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/55461/

Rutgers University

7. Yesner, Gregory, 1991-. Piezoelectric materials and energy harvesting using a novel transducer design.

Degree: PhD, Materials Science and Engineering, 2018, Rutgers University

URL: https://rucore.libraries.rutgers.edu/rutgers-lib/56159/

► Bismuth based piezoelectric ceramics such as 0.88Bi1/2Na1/2TiO3 – 0.08Bi1/2K1/2TiO3 – 0.04BaTiO3 (BNKBT88) are a promising lead-free candidate with moderate piezoelectric properties for use in in… (more)

▼ Bismuth based piezoelectric ceramics such as 0.88Bi1/2Na1/2TiO3 – 0.08Bi1/2K1/2TiO3 – 0.04BaTiO3 (BNKBT88) are a promising lead-free candidate with moderate piezoelectric properties for use in in transducers, multilayer actuators (MLA), and piezoelectric transformers. This dissertation focuses on three areas of piezoelectric research: i) development of a BNT-based co-fired actuator with copper metal electrodes sintered at low temperature and in controlled oxygen atmosphere, ii) study the effect of A-site non-stoichiometry in BNKBT ceramics and improvement of the electrical resistivity in Bi-deficient composition for a high power transducer application, and iii) development of a prototype bridge transducer with a novel electrode pattern utilizing d33 for enhanced energy generation. i) Compatibility of Bi-based ceramics and copper electrodes was demonstrated by co-firing BNKBT88 ceramics with copper electrodes at 900 °C in controlled atmosphere with an oxygen partial pressure of 6.1x10-8 atm. A combination of additives for low temperature sintering was used for firing at 900 °C in air or controlled atmosphere with minimal effect on the piezoelectric properties of BNKBT88 compared to sintering at 1150 °C. The oxygen atmosphere was controlled during sintering by mixing carbon dioxide and a hydrogen-nitrogen mixture. To keep the concentration of oxygen within the narrow range necessary for the coexistence of Cu metal and Bi2O3, the BNKBT88 samples were placed inside of a rectangular alumina boat and covered with a custom drilled alumina plate. A mixture of copper metal powder and cuprous oxide (Cu2O) were placed adjacent to the samples inside of the alumina boat to release or absorb excess O2. BNKBT88 ceramics were successfully co-fired with internal and surface Cu metal electrodes. ii) The effect of non-stoichiometry of A-site cations in BNKBT88 was studied. Hardening and softening of piezoelectric properties has been observed. The most notable effect is that the mechanical quality factor, which is an essential figure of merit for high power application, is as high as 1200 for the Bi-deficient composition compared to 150 for the unmodified composition. Multilayer bismuth deficient BNKBT88 with co-fired copper metal electrodes is candidate for use in a lead-free piezoelectric transformer. iii) A prototype novel lead zirconate titanate (PZT) bridge transducer based on the cymbal design has been developed for energy harvesting from impact loading by vehicle- induced deformations on pavement. Efficient transfer of mechanical energy from the road to the piezoelectric transducers embedded beneath the surface is achieved through mechanical coupling of the transducer and the pavement. A busy highway can be used as a source of electrical power where the harvested energy can be transmitted to the electrical grid or used to power streetlights. The novel transducer is also a highly sensitive detector that has the potential to be used to monitor vehicles on a roadway. The novel transducers generate energy to power electronic… Advisors/Committee Members: Safari, Ahmad (chair), Amatucci, Glenn (internal member), Birnie, Dunbar (internal member), Maher, Ali (outside member), School of Graduate Studies.

Subjects/Keywords: Piezoelectric ceramics

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APA (6^th Edition):

Yesner, Gregory, 1. (2018). Piezoelectric materials and energy harvesting using a novel transducer design. (Doctoral Dissertation). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/56159/

Chicago Manual of Style (16^th Edition):

Yesner, Gregory, 1991-. “Piezoelectric materials and energy harvesting using a novel transducer design.” 2018. Doctoral Dissertation, Rutgers University. Accessed February 27, 2020. https://rucore.libraries.rutgers.edu/rutgers-lib/56159/.

MLA Handbook (7^th Edition):

Yesner, Gregory, 1991-. “Piezoelectric materials and energy harvesting using a novel transducer design.” 2018. Web. 27 Feb 2020.

Vancouver:

Yesner, Gregory 1. Piezoelectric materials and energy harvesting using a novel transducer design. [Internet] [Doctoral dissertation]. Rutgers University; 2018. [cited 2020 Feb 27]. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/56159/.

Council of Science Editors:

Yesner, Gregory 1. Piezoelectric materials and energy harvesting using a novel transducer design. [Doctoral Dissertation]. Rutgers University; 2018. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/56159/

Rutgers University

8. Taghaddos, Elaheh. Development and electro-acoustic properties of BNKLT-based piezoelectric ceramic.

Degree: PhD, Materials Science and Engineering, 2019, Rutgers University

URL: https://rucore.libraries.rutgers.edu/rutgers-lib/61122/

► The functionality of piezoelectric materials to interconverting the mechanical and electrical energy leads to a huge market of piezoelectric materials in a wide range of… (more)

▼ The functionality of piezoelectric materials to interconverting the mechanical and electrical energy leads to a huge market of piezoelectric materials in a wide range of applications from daily use, such as a speaker, musical instrument, humidifier to more specialized applications in military, medical and automotive industries. The market of piezoelectric is dominated by Pb(ZrxTi1-x)O3 compositions with outstanding electromechanical properties. However, it is essential to replace lead-containing piezoelectric materials with non-toxic alternatives. Bismuth sodium titanate and its solid solution are a promising lead-free candidate for transducer and actuators applications. The ternary solid solution of 0.88BNT-0.08BKT-0.04BLT (BNKLT88) exhibits high coercive field (Ec ~ 47 kV.cm-1), mechanical quality factor (Qm ~ 420), depolarization temperature (Td ~ 220 °C), and low dielectric loss (tan ~ 1.2%). These desired high power properties make BNT-based composition a potential lead-free candidate to replace for hard commercial PZT. In this dissertation, an attempt has been made to study the effect of B-site Mn and Fe acceptor dopants on the mechanical quality factor of BNKLT88 ceramics and improve the high power performance. The samples were processed by conventional and flash sintering methods. The effect of sintering parameters on the crystal structure, piezoelectric, dielectric and electrical properties have been comprehensively evaluated. The electromechanical properties were measured by the IEEE-Standard procedures. The impedance spectroscopy technique was used to characterize the electrical conductivity and impedance relaxation of the specimen. The optimum electromechanical properties were obtained at 1.5 mol% of Mn or Fe-doped composition processed by the conventional sintering method. The functionality of the (BiNa0.88 K0.08Li0.04)0.5Ti0.985Mn0.015O3 ceramic for high power application has been evaluated by prototyping of low frequency transducer. In the conventional sintering method, the effect of both sintering temperature and the particle size on the electromechanical properties showed improved mechanical quality factor up to 1200 in calcined powder with a median particle size of 535 nm. The evaluation of the mechanical quality factor as a function of vibration velocity for high power application showed lower heat generation resulting in stable Qm at higher vibration velocity of 0.6 m.s-1 and reduction of input power by 70-75%. X-ray photoelectron microscopy study of the specimen indicated coexistence of Mn 2+/Mn+3 or Fe2+/Fe+3 in Mn or Fe-doped ceramics. In flash sintering (FS), the optimum sintering parameters to fully densify BNKL88-1.5Mn composition were achieved at 1 KHz alternating current, 100 V·cm-1 initial electric field and the preset maximum current limit of 1.5 A·cm-2. The uniform distribution of elements was observed via energy-dispersive spectroscopy. Ceramics with finer grain size of 10-15 µm, similar electromechanical properties, more symmetric butterfly shape strain, and lower resistivity have… Advisors/Committee Members: Safari, Ahmad (chair), School of Graduate Studies.

Subjects/Keywords: Piezoelectric ceramics

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Taghaddos, E. (2019). Development and electro-acoustic properties of BNKLT-based piezoelectric ceramic. (Doctoral Dissertation). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/61122/

Chicago Manual of Style (16^th Edition):

Taghaddos, Elaheh. “Development and electro-acoustic properties of BNKLT-based piezoelectric ceramic.” 2019. Doctoral Dissertation, Rutgers University. Accessed February 27, 2020. https://rucore.libraries.rutgers.edu/rutgers-lib/61122/.

MLA Handbook (7^th Edition):

Taghaddos, Elaheh. “Development and electro-acoustic properties of BNKLT-based piezoelectric ceramic.” 2019. Web. 27 Feb 2020.

Vancouver:

Taghaddos E. Development and electro-acoustic properties of BNKLT-based piezoelectric ceramic. [Internet] [Doctoral dissertation]. Rutgers University; 2019. [cited 2020 Feb 27]. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/61122/.

Council of Science Editors:

Taghaddos E. Development and electro-acoustic properties of BNKLT-based piezoelectric ceramic. [Doctoral Dissertation]. Rutgers University; 2019. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/61122/

Rutgers University

9. Athavale, Abhinav A., 1990-. An analytical model for piezoelectric unimorph cantilever subjected to an impulse load.

Degree: MS, Mechanical and Aerospace Engineering, 2015, Rutgers University

URL: https://rucore.libraries.rutgers.edu/rutgers-lib/47251/

► Researchers have been studying ways to harvest various ambient vibrations using piezoelectric materials to power wireless sensors and portable electronics. Literature review includes several such… (more)

Subjects/Keywords: Piezoelectric materials

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APA (6^th Edition):

Athavale, Abhinav A., 1. (2015). An analytical model for piezoelectric unimorph cantilever subjected to an impulse load. (Masters Thesis). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/47251/

Chicago Manual of Style (16^th Edition):

Athavale, Abhinav A., 1990-. “An analytical model for piezoelectric unimorph cantilever subjected to an impulse load.” 2015. Masters Thesis, Rutgers University. Accessed February 27, 2020. https://rucore.libraries.rutgers.edu/rutgers-lib/47251/.

MLA Handbook (7^th Edition):

Athavale, Abhinav A., 1990-. “An analytical model for piezoelectric unimorph cantilever subjected to an impulse load.” 2015. Web. 27 Feb 2020.

Vancouver:

Athavale, Abhinav A. 1. An analytical model for piezoelectric unimorph cantilever subjected to an impulse load. [Internet] [Masters thesis]. Rutgers University; 2015. [cited 2020 Feb 27]. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/47251/.

Council of Science Editors:

Athavale, Abhinav A. 1. An analytical model for piezoelectric unimorph cantilever subjected to an impulse load. [Masters Thesis]. Rutgers University; 2015. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/47251/

Rutgers University

10. Szulczewski, Joshua Michael, 1984-. Flip-through effect and bending of PVDF shallow spherical piezo-electrical switches.

Degree: PhD, Civil and Environmental Engineering, 2016, Rutgers University

URL: https://rucore.libraries.rutgers.edu/rutgers-lib/50189/

►

The use of piezo-electrical devices is becoming more widespread. The principle of such devices was discovered to aid in the study of radiation. The piezo-device… (more)

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The use of piezo-electrical devices is becoming more widespread. The principle of such devices was discovered to aid in the study of radiation. The piezo-device was found to give off an electrical charge when it was depressed. A year later, researchers also realized that not only could this device give off electrical charge, but also, if an electric charge was released into it, that it would turn that electrical charge into mechanical work. There is also study of a phenomenon called the flip effect. This effect occurs when a structure is created by fusing two materials together. For the remainder of this thesis we will use the term bi-material to describe such a structure. The flip-effect occurs when a solid structure is heated (or freeze) whereby energy is either added or removed. As a result, the structure becomes unstable in its current configuration and transitions to a new stable state. This happens because there is internal moment within the structure that gives it rigidity. This thesis looks at the equations that are related to energy for what causes the structure to become unstable and then flip to the other side. Another aspect that was looked at was how COMSOL models also demonstrate that such a structure can be created. The energy equations are related to theses COMSOL models. From the model information a structure is then built from manufactured parts. When the researcher was looking for materials to experiment piezo-electrical polymers were found. These polymers are quite new and not widely utilized at present. They have been primarily used in speaker systems. Previously, speaker systems were made of quartz, paper, or other types of vibrating materials. These polymers were selected as a basis for this thesis since they are exceptionally flexible and easy to mold. Experiments have been conducted with piezo-polymers, with results that are similar to the COMSOL and the derived equations. It was found that a fairly reliable switch can be created using the polymers; however, there are questions of cost and design constraints that have to be looked at on a case-by-case basis.

Advisors/Committee Members: Yong, Yook-Kong (chair), Najm, Husam (internal member), WANG, HAO (internal member), Ucharin, Chris (outside member).

Subjects/Keywords: Piezoelectric devices

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Szulczewski, Joshua Michael, 1. (2016). Flip-through effect and bending of PVDF shallow spherical piezo-electrical switches. (Doctoral Dissertation). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/50189/

Chicago Manual of Style (16^th Edition):

Szulczewski, Joshua Michael, 1984-. “Flip-through effect and bending of PVDF shallow spherical piezo-electrical switches.” 2016. Doctoral Dissertation, Rutgers University. Accessed February 27, 2020. https://rucore.libraries.rutgers.edu/rutgers-lib/50189/.

MLA Handbook (7^th Edition):

Szulczewski, Joshua Michael, 1984-. “Flip-through effect and bending of PVDF shallow spherical piezo-electrical switches.” 2016. Web. 27 Feb 2020.

Vancouver:

Szulczewski, Joshua Michael 1. Flip-through effect and bending of PVDF shallow spherical piezo-electrical switches. [Internet] [Doctoral dissertation]. Rutgers University; 2016. [cited 2020 Feb 27]. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/50189/.

Council of Science Editors:

Szulczewski, Joshua Michael 1. Flip-through effect and bending of PVDF shallow spherical piezo-electrical switches. [Doctoral Dissertation]. Rutgers University; 2016. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/50189/

Rutgers University

11. Sundar, Udhay, 1989-. Dielectric and piezoelectric properties of percolative three-phase piezoelectric polymer composites.

Degree: MS, Mechanical and Aerospace Engineering, 2016, Rutgers University

URL: https://rucore.libraries.rutgers.edu/rutgers-lib/50193/

► Three-phase piezoelectric bulk composites were fabricated using a mix and cast method. The composites were comprised of lead zirconate titanate (PZT), aluminum (Al) and an… (more)

▼ Three-phase piezoelectric bulk composites were fabricated using a mix and cast method. The composites were comprised of lead zirconate titanate (PZT), aluminum (Al) and an epoxy matrix. The volume fraction of the PZT and Al were varied from 0.1 to 0.3 and 0.0 to 0.17, respectively. The influences of three entities on piezoelectric and dielectric properties: inclusion of an electrically conductive filler (Al), poling process (contact and Corona) and Al surface treatment, were observed. The piezoelectric strain coefficient, d33, effective dielectric constant, r, capacitance, C, and resistivity were measured and compared according to poling process, volume fraction of constituent phases and Al surface treatment. The maximum values of d33 were ~3.475 and ~1.0 pC/N for Corona and contact poled samples respectively, for samples with volume fractions of 0.40 and 0.13 of PZT and Al (surface treated) respectively. Also, the maximum dielectric constant for the surface treated Al samples was ~411 for volume fractions of 0.40 and 0.13 for PZT and Al respectively. The percolation threshold was observed to occur at an Al volume fraction of 0.13. The composites achieved a percolated state for Al volume fractions >0.13 for both contact and corona poled samples. In addition, a comparative time study was conducted to examine the influence of surface treatment processing time of Al particles. The effectiveness of the surface treatment, sample morphology and composition was observed with the aid of SEM and EDS images. These images were correlated with piezoelectric and dielectric properties. PZT-epoxy-aluminum thick films (200 µm) were also fabricated using a two-step spin coat deposition and annealing method. The PZT volume fraction were varied from 0.2, 0.3 and 0.4, wherein the Aluminum volume fraction was varied from 0.1 to 0.17 for each PZT volume fraction, respectively. The two-step process included spin coating the first layer at 500 RPM for 30 seconds, and the second layer at 1000 RPM for 1 minute. The piezoelectric strain coefficients d33 and d31, capacitance and the dielectric constant were measured, and were studied as a function of Aluminum volume fraction. Advisors/Committee Members: Cook-Chennault, Kimberly (chair), Baruh, Haim (internal member), Mazzeo, Aaron (internal member).

Subjects/Keywords: Piezoelectric materials

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APA (6^th Edition):

Sundar, Udhay, 1. (2016). Dielectric and piezoelectric properties of percolative three-phase piezoelectric polymer composites. (Masters Thesis). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/50193/

Chicago Manual of Style (16^th Edition):

Sundar, Udhay, 1989-. “Dielectric and piezoelectric properties of percolative three-phase piezoelectric polymer composites.” 2016. Masters Thesis, Rutgers University. Accessed February 27, 2020. https://rucore.libraries.rutgers.edu/rutgers-lib/50193/.

MLA Handbook (7^th Edition):

Sundar, Udhay, 1989-. “Dielectric and piezoelectric properties of percolative three-phase piezoelectric polymer composites.” 2016. Web. 27 Feb 2020.

Vancouver:

Sundar, Udhay 1. Dielectric and piezoelectric properties of percolative three-phase piezoelectric polymer composites. [Internet] [Masters thesis]. Rutgers University; 2016. [cited 2020 Feb 27]. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/50193/.

Council of Science Editors:

Sundar, Udhay 1. Dielectric and piezoelectric properties of percolative three-phase piezoelectric polymer composites. [Masters Thesis]. Rutgers University; 2016. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/50193/

Wright State University

12. Anusha, Anisetti. Non-linear Shunting of Piezo-actuators for Vibration Suppression.

Degree: MSEgr, Mechanical Engineering, 2008, Wright State University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=wright1208834134

► Vibrations at a resonant frequency lead to catastrophic failure or at the very least, shorten the life span of the structure due to fatigue.… (more)

▼ Vibrations at a resonant frequency lead to catastrophic failure or at the very least, shorten the life span of the structure due to fatigue. These problems force engineers to implement damping techniques. Smart materials have been used over two decades to reduced vibration amplitudes. Recently, there has been much research and development on smart materials and structures. This work introduces an innovative approach for vibration suppression using passively shunted piezolectric materials. Initially linear circuit elements such as resistors, capacitors, and inductances, or building a non-linear circuit with different impedance designs were used. Instead of such elements, a switched electromechanical shunt has been proposed as a method to suppress vibrations of mechanical structures. In this state switching technique, bonded piezoelectric elements are switched from open circuit to closed circuit depending on the voltage produced from the piezoelectric patch. This new shunt circuit utilizes diodes. Diodes are nonlinear circuit elements and vibration amplitude is reduced due to introduction of nonlinearity into the system. A physics-based electro-mechanical model is developed and validated against experimental results. The smart plate consists of a rectangular aluminum plate modeled in cantilever configuration with surface bonded piezoelectric patches. Basic equations for piezoelectric sensors and actuators are presented. The equation of motion for the plate structure with bonded piezoelectric patch is depicted. The implementation of the circuit is demonstrated analytically and experimentally. The concept is demonstrated on two different modes and vibration peaks are lowered using the above mentioned circuit. Then a numerical model of the plate with the piezoelectric patch and the circuit is built in Simulink after designing a finite element model in ABAQUS. The data shows the effect of damping in Frequency Response Functions (FRFs) and in the response plots. A state-space model is also developed. Simulations of the model are compared to the experimental results. The results indicate the feasibility of the smart damping materials for many industrial applications where reducing noise and vibrations are desired. It is clear that the maximum suppression that can be obtained with this method is dependent on the voltage drop across the piezoelectric element. Advisors/Committee Members: Slater, Joseph (Advisor).

Subjects/Keywords: Acoustics; piezoelectric; piezoelectric patch; FRFs; patch; ABAQUS

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APA (6^th Edition):

Anusha, A. (2008). Non-linear Shunting of Piezo-actuators for Vibration Suppression. (Masters Thesis). Wright State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=wright1208834134

Chicago Manual of Style (16^th Edition):

Anusha, Anisetti. “Non-linear Shunting of Piezo-actuators for Vibration Suppression.” 2008. Masters Thesis, Wright State University. Accessed February 27, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=wright1208834134.

MLA Handbook (7^th Edition):

Anusha, Anisetti. “Non-linear Shunting of Piezo-actuators for Vibration Suppression.” 2008. Web. 27 Feb 2020.

Vancouver:

Anusha A. Non-linear Shunting of Piezo-actuators for Vibration Suppression. [Internet] [Masters thesis]. Wright State University; 2008. [cited 2020 Feb 27]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=wright1208834134.

Council of Science Editors:

Anusha A. Non-linear Shunting of Piezo-actuators for Vibration Suppression. [Masters Thesis]. Wright State University; 2008. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=wright1208834134

AUT University

13. Meng, Lei. An investigation into the development of a miniature Piezoelectric pump .

Degree: 2012, AUT University

URL: http://hdl.handle.net/10292/4458

► This thesis is aimed at improving the understanding and effectiveness in operating of the micropump in CPAP system. The principle objectives were to understand the… (more)

Subjects/Keywords: Investigation Piezoelectric micropump; Miniature Piezoelectric pump

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APA (6^th Edition):

Meng, L. (2012). An investigation into the development of a miniature Piezoelectric pump . (Thesis). AUT University. Retrieved from http://hdl.handle.net/10292/4458

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Meng, Lei. “An investigation into the development of a miniature Piezoelectric pump .” 2012. Thesis, AUT University. Accessed February 27, 2020. http://hdl.handle.net/10292/4458.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Meng, Lei. “An investigation into the development of a miniature Piezoelectric pump .” 2012. Web. 27 Feb 2020.

Vancouver:

Meng L. An investigation into the development of a miniature Piezoelectric pump . [Internet] [Thesis]. AUT University; 2012. [cited 2020 Feb 27]. Available from: http://hdl.handle.net/10292/4458.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Meng L. An investigation into the development of a miniature Piezoelectric pump . [Thesis]. AUT University; 2012. Available from: http://hdl.handle.net/10292/4458

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

NSYSU

14. Wu, Bing-Rung. The fabrication of piezoelectric transducers by depositing ZnO films on PET substrates.

Degree: Master, Electrical Engineering, 2009, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0804109-044040

► In this thesis, piezoelectric transducers were fabricated by depositing ZnO films on PET substrates. The optimal deposition parameters for ZnO films are sputtering pressure of… (more)

Subjects/Keywords: ZnO; piezoelectric transducers

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APA (6^th Edition):

Wu, B. (2009). The fabrication of piezoelectric transducers by depositing ZnO films on PET substrates. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0804109-044040

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Wu, Bing-Rung. “The fabrication of piezoelectric transducers by depositing ZnO films on PET substrates.” 2009. Thesis, NSYSU. Accessed February 27, 2020. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0804109-044040.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Wu, Bing-Rung. “The fabrication of piezoelectric transducers by depositing ZnO films on PET substrates.” 2009. Web. 27 Feb 2020.

Vancouver:

Wu B. The fabrication of piezoelectric transducers by depositing ZnO films on PET substrates. [Internet] [Thesis]. NSYSU; 2009. [cited 2020 Feb 27]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0804109-044040.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Wu B. The fabrication of piezoelectric transducers by depositing ZnO films on PET substrates. [Thesis]. NSYSU; 2009. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0804109-044040

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Oregon State University

15. Shelton, Christopher T. Development of perovskite thin films for use in piezoelectric based microelectromechanical systems.

Degree: MS, Materials Science, 2009, Oregon State University

URL: http://hdl.handle.net/1957/13164

► The lead-zirconate-titanate (PZT) solid solution system is currently the workhorse of piezoelectric-based microelectromechanical systems (MEMS) research. Among bulk materials it is known to be one… (more)

▼ The lead-zirconate-titanate (PZT) solid solution system is currently the workhorse of piezoelectric-based microelectromechanical systems (MEMS) research. Among bulk materials it is known to be one of the strongest piezoelectrics, with extremely high piezoelectric coefficients and electro-mechanical coupling factors. Reproducing these exceptional qualities in thin film form, however, requires precise tuning of composition and texture. In this thesis, methods to grow textured or epitaxial PZT thin films are investigated. Solution based methods were chosen to develop conductive LaNiO3 films on biaxially textured substrates for lattice matched bottom electrodes. The goal was to maximize crystallinity and minimize resistivity through precursor modification and thermal treatments. By depositing LaNiO3 on flexible nickel alloy tapes with biaxially textured ion-beam-assisted-deposition (IBAD) MgO buffer layers, highly oriented thin films were produced with conductivity around 600 μΩ-cm. These films are excellent template layers for PZT and other technologically interesting perovskite oxide materials. Additionally, their conductivity allows for direct fabrication of metal- insulator-metal structures. Chemical solution deposition (CSD) and physical vapor deposition (PVD) techniques were also used to optimize orientation in PZT thin films. A comprehensive investigation of lead chemistry as well as pyrolysis and annealing conditions was performed to determine processing-structure-property relationships in PZT films. In concert, sputtering methods were also developed for comparison of thin film PZT properties from PVD and CSD routes. Combining knowledge from the previous experiments, highly (00l) oriented PZT thin films were created by exploiting epitaxial relationships between the IBAD substrate, the LaNiO3 bottom electrode, and the active PZT layer. The resulting PZT on IBAD films showed single-crystal-like ferroelectric hysteresis loops with remnant polarization values of 40 μC/cm2, which is comparable to measured values on single crystal substrates. It is expected that these films will offer enhanced piezoelectric actuation due to their high degree of orientation, relatively small amount of high-angle grain boundaries and their superior ferroelectric characteristics. Additionally, the flexibility of the substrate opens doors to many exciting materials integration possibilities for MEMS devices including energy harvesting applications and flexible sensors. Advisors/Committee Members: Gibbons, Brady J. (advisor), Cann, David P. (committee member).

Subjects/Keywords: piezoelectricity; Piezoelectric materials

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Shelton, C. T. (2009). Development of perovskite thin films for use in piezoelectric based microelectromechanical systems. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/13164

Chicago Manual of Style (16^th Edition):

Shelton, Christopher T. “Development of perovskite thin films for use in piezoelectric based microelectromechanical systems.” 2009. Masters Thesis, Oregon State University. Accessed February 27, 2020. http://hdl.handle.net/1957/13164.

MLA Handbook (7^th Edition):

Shelton, Christopher T. “Development of perovskite thin films for use in piezoelectric based microelectromechanical systems.” 2009. Web. 27 Feb 2020.

Vancouver:

Shelton CT. Development of perovskite thin films for use in piezoelectric based microelectromechanical systems. [Internet] [Masters thesis]. Oregon State University; 2009. [cited 2020 Feb 27]. Available from: http://hdl.handle.net/1957/13164.

Council of Science Editors:

Shelton CT. Development of perovskite thin films for use in piezoelectric based microelectromechanical systems. [Masters Thesis]. Oregon State University; 2009. Available from: http://hdl.handle.net/1957/13164

Penn State University

16. Zhuang, Yuan. LOSS PHENOMENOLOGY AND THE METHODOLOGY TO DERIVE LOSS FACTORS IN PIEZOELECTRIC CERAMICS.

Degree: PhD, Electrical Engineering, 2011, Penn State University

URL: https://etda.libraries.psu.edu/catalog/12219

► The key factor for the miniaturization of piezoelectric devices is the power density, which is limited by the heat generation or internal losses. With accelerating… (more)

▼ The key factor for the miniaturization of piezoelectric devices is the power density, which is limited by the heat generation or internal losses. With accelerating the commercialization of piezoelectric actuators and transducers, it becomes more and more significant to clarify the loss phenomenology, reduce the hysteresis losses, and increase the mechanical quality factor to enhance the efficiency and performance. There are three loss components for piezoelectric vibrators, i.e., dielectric, elastic and piezoelectric losses. These loss factors are related with mechanical quality factors, which are the figure of merit of the material or device in the sense of efficiency. In order to obtain the mechanical quality factor Qm, IEEE standard provided the measurement method using the resonance and antiresonance frequencies. However, this characterization assumes that the Q value at resonance is equal to the one at antiresonance all the time, which is not consistent with experiment results. For practical materials there is sometimes a big difference between the mechanical quality factors of the resonance (QA) and the antiresonance (QB), and in most cases higher QB can be observed. Therefore, in recent several years we are focusing on a new resonance AC drive methodology to measure the admittance curve accurately around both the resonance and antiresonance peaks for piezoelectric materials, from which QA and QB can be derived by the 3dB method. Various piezoelectric materials were characterized with this technique. Further, the equations were derived showing the relations between quality factors and loss factors by the complex analysis of the admittance/ impedance expressions for specific piezoelectric vibrators. Using QA, QB, and the electromechanical coupling factor k, we can obtain three types of loss factors precisely. Among various vibration modes of piezoelectric vibrators, we focus on k31, kt, k33, kp, and k15 modes, which cover all the 20 parameters of the ferroelectric material with ∞mm/6mm crystal symmetry, i.e. piezoelectric ceramic. Plus some other derivations using the fundamental correlations, 20 loss factors can be obtained for all parameters. Using this technique the piezoelectric loss factor is confirmed to be comparable to dielectric and elastic losses and it is the factor that determines whether QB is larger than QA, though it was previously neglected by most researchers. After getting the full loss matrices, the loss anisotropy was accordingly discussed, and the extensive loss factor was verified to be smaller than the intensive one. This methodology is an essential supplement to the current IEEE standard on piezoelectric characterization. The simplicity and accuracy of this technique are very attractive, and hopefully this proposal will be widely accepted as a standard in the piezoelectric community in the future. The inclusion of three loss factors is important for the admittance analysis and thermal simulation of piezoelectric devices in the “finite element method” software. Furthermore, taking…

Subjects/Keywords: loss characterization; piezoelectric

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APA (6^th Edition):

Zhuang, Y. (2011). LOSS PHENOMENOLOGY AND THE METHODOLOGY TO DERIVE LOSS FACTORS IN PIEZOELECTRIC CERAMICS. (Doctoral Dissertation). Penn State University. Retrieved from https://etda.libraries.psu.edu/catalog/12219

Chicago Manual of Style (16^th Edition):

Zhuang, Yuan. “LOSS PHENOMENOLOGY AND THE METHODOLOGY TO DERIVE LOSS FACTORS IN PIEZOELECTRIC CERAMICS.” 2011. Doctoral Dissertation, Penn State University. Accessed February 27, 2020. https://etda.libraries.psu.edu/catalog/12219.

MLA Handbook (7^th Edition):

Zhuang, Yuan. “LOSS PHENOMENOLOGY AND THE METHODOLOGY TO DERIVE LOSS FACTORS IN PIEZOELECTRIC CERAMICS.” 2011. Web. 27 Feb 2020.

Vancouver:

Zhuang Y. LOSS PHENOMENOLOGY AND THE METHODOLOGY TO DERIVE LOSS FACTORS IN PIEZOELECTRIC CERAMICS. [Internet] [Doctoral dissertation]. Penn State University; 2011. [cited 2020 Feb 27]. Available from: https://etda.libraries.psu.edu/catalog/12219.

Council of Science Editors:

Zhuang Y. LOSS PHENOMENOLOGY AND THE METHODOLOGY TO DERIVE LOSS FACTORS IN PIEZOELECTRIC CERAMICS. [Doctoral Dissertation]. Penn State University; 2011. Available from: https://etda.libraries.psu.edu/catalog/12219

Louisiana State University

17. Meyer, Ryan Michael. Enhancement of single-lap joint strength under tension using piezoelectric actuation.

Degree: MSME, Mechanical Engineering, 2010, Louisiana State University

URL: etd-04282010-111748 ; https://digitalcommons.lsu.edu/gradschool_theses/2730

► Composite adhesively bonded joint structures have seen increased use over conventional riveted due to their ease of manufacturing and quality strength-to-weight ratios. However, adhesively bonded… (more)

▼ Composite adhesively bonded joint structures have seen increased use over conventional riveted due to their ease of manufacturing and quality strength-to-weight ratios. However, adhesively bonded joints lack the rigidity and failure strength of riveted assemblies, due to high stress concentrations which develop in the adhesive layer, which makes them prone to undesirable deformation and failure. Piezoelectric materials feature the ability to produce mechanical strain when subjected to an applied voltage and vice-versa. Therefore, it is proposed to use piezoelectric actuators to transmit counterbalancing forces to increase the rigidity and strength of composite joints. Existing studies have been limited in that they have focused on the effect of piezoelectric actuators bonded to or embedded in a single beam. This work studies the use of surface bonded piezoelectric linear strain actuators, and their effect on induced static deflection of composite joint structures. Euler-Bernoulli beam theory is utilized to derive the elastic curves of the proposed structures due to actuation forces and external loading, while accounting for physical parameters of the structures. By decreasing the deflection within the adhesively bonded region, especially at the critical joint locations where high stress concentrations are developed in the adhesive layer, the overall strength of the joint can be improved. The effects of straight beam actuation and small beam curvature actuation are discussed. A numerical study is performed at evaluating the effectiveness of piezoelectric actuation based on straight beam and small curvature beam actuation, as well as bond location. It is shown that small beam curvature actuation increases the amount of deflection which can be produced by the piezoelectric actuator. The effects of four possible piezoelectric bond regions are analyzed. It is shown that bonding the piezoelectric actuator in Region II most effectively reduces detrimental deflections caused by tensile loading at the critical joint locations.

Subjects/Keywords: joint; deflection; piezoelectric

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APA (6^th Edition):

Meyer, R. M. (2010). Enhancement of single-lap joint strength under tension using piezoelectric actuation. (Masters Thesis). Louisiana State University. Retrieved from etd-04282010-111748 ; https://digitalcommons.lsu.edu/gradschool_theses/2730

Chicago Manual of Style (16^th Edition):

Meyer, Ryan Michael. “Enhancement of single-lap joint strength under tension using piezoelectric actuation.” 2010. Masters Thesis, Louisiana State University. Accessed February 27, 2020. etd-04282010-111748 ; https://digitalcommons.lsu.edu/gradschool_theses/2730.

MLA Handbook (7^th Edition):

Meyer, Ryan Michael. “Enhancement of single-lap joint strength under tension using piezoelectric actuation.” 2010. Web. 27 Feb 2020.

Vancouver:

Meyer RM. Enhancement of single-lap joint strength under tension using piezoelectric actuation. [Internet] [Masters thesis]. Louisiana State University; 2010. [cited 2020 Feb 27]. Available from: etd-04282010-111748 ; https://digitalcommons.lsu.edu/gradschool_theses/2730.

Council of Science Editors:

Meyer RM. Enhancement of single-lap joint strength under tension using piezoelectric actuation. [Masters Thesis]. Louisiana State University; 2010. Available from: etd-04282010-111748 ; https://digitalcommons.lsu.edu/gradschool_theses/2730

University of Manchester

18. Qi, Shaofan. Investigation of a novel multiresonant beam energy harvester and a complex conjugate matching circuit.

Degree: 2011, University of Manchester

URL: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:120197

►

The aim of the work described in this thesis is firstly to improve the collection of vibration energy for piezoelectric cantilever harvesters, by a mechanical… (more)

▼

The aim of the work described in this thesis is firstly to improve the collection of vibration energy for piezoelectric cantilever harvesters, by a mechanical technique, so that the devices can harvest energy over a wider bandwidth. Secondly to investigate a new circuit topology for achieving complex conjugate load matching to the piezoelectric harvester. The thesis has been divided into two parts – the mechanical approach and the electrical approach.For the mechanical approach, a novel multiresonant beam, comprising piezoelectric fiber composites on a clamped-clamped beam and side mounted cantilevers, was proposed. The side cantilevers are tuned by tip masses to be resonant at different frequencies. A Rayleigh-Ritz model was developed to predict the vibration response of the proposed model multiresonant beam. This model showed that the bandwidth of the multiresonant beam was increased over that of a single cantilever harvester.A multiresonant beam for energy harvesting was experimentally tested and compared with a single cantilever energy harvester. The transmissibility and voltage responses were investigated, the beam showed a wide frequency response between 14.5Hz and 31Hz, whereas the single cantilever only showed one resonant frequency. Therefore the multiresonant beam system is feasible for wide band energy harvesting.For the electrical approach, the task was to investigate complex conjugate impedance matching for the piezoelectric energy harvesters, so that the output impedance from the piezoelectric harvester can be reduced, and maximum energy extracted from the device with a possibility of frequency tuning. A new amplified inductor circuit was proposed to enable the capacitive output impedance of the piezoelectric device to be cancelled. Experimental and software simulations are provided to verify the theoretical predictions.A prototype amplified inductor circuit was simulated and tested. The results showed that a variable effective inductance was achieved. However the circuit is lossy due to imperfections within the system, and needs further work to eliminate these imperfections.

N/A

Advisors/Committee Members: Shuttleworth, Roger.

Subjects/Keywords: piezoelectric; energy harvesting

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APA (6^th Edition):

Qi, S. (2011). Investigation of a novel multiresonant beam energy harvester and a complex conjugate matching circuit. (Doctoral Dissertation). University of Manchester. Retrieved from http://www.manchester.ac.uk/escholar/uk-ac-man-scw:120197

Chicago Manual of Style (16^th Edition):

Qi, Shaofan. “Investigation of a novel multiresonant beam energy harvester and a complex conjugate matching circuit.” 2011. Doctoral Dissertation, University of Manchester. Accessed February 27, 2020. http://www.manchester.ac.uk/escholar/uk-ac-man-scw:120197.

MLA Handbook (7^th Edition):

Qi, Shaofan. “Investigation of a novel multiresonant beam energy harvester and a complex conjugate matching circuit.” 2011. Web. 27 Feb 2020.

Vancouver:

Qi S. Investigation of a novel multiresonant beam energy harvester and a complex conjugate matching circuit. [Internet] [Doctoral dissertation]. University of Manchester; 2011. [cited 2020 Feb 27]. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:120197.

Council of Science Editors:

Qi S. Investigation of a novel multiresonant beam energy harvester and a complex conjugate matching circuit. [Doctoral Dissertation]. University of Manchester; 2011. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:120197

Oregon State University

19. Brookshire, Kirsten L. Synthesis and characterization of Pb(Zr,Ti)O₃ thin films for microelectromechanical systems.

Degree: MS, Materials Science, 2011, Oregon State University

URL: http://hdl.handle.net/1957/25794

► Pb(Zr,Ti)O₃ (PZT) is a very attractive material for use in piezoelectric-based microelectromechanical systems (MEMS) due to its high piezoelectric coefficients and ability for large displacements… (more)

▼ Pb(Zr,Ti)O₃ (PZT) is a very attractive material for use in piezoelectric-based microelectromechanical systems (MEMS) due to its high piezoelectric coefficients and ability for large displacements with relatively low applied fields (as compared to electrostatic-based MEMS). The piezoelectric effect is strongly anisotropic, thus it is very desirable to control the crystallographic orientation of the active material. This study is designed to understand the effect of crystallographic texture on the long-term stability of piezoelectric-based MEMS devices. Utilizing (100)-oriented solution deposited LaNiO₃ (LNO) and PbTiO₃ (PT) seed layers, (001) fiber texture of rfmagnetron sputtered PZT films (ex situ annealed) with varying thickness was optimized. X-ray diffraction rocking curve data indicated good out-of-plane alignment, with full-width-at-half-maximum (FWHM) values of 3.8° - 4.5° and 2.5°- 3.1° for PZT on LNO and PT, respectively. This optimization of (001) orientation is paramount to maximizing the piezoelectric response of PZT thin films for MEMS applications, as this promotes the highest piezoelectric response. Dielectric and ferroelectric properties were obtained for films 120-1320 nm thick. Subsequently these films were subjected to lifetime (fatigue) tests similar to what is experienced in piezo- MEMS applications. Fatigue endurance is a critical factor in evaluating long-term device reliability in these devices. A study of fatigue dependence on film thickness, morphology, bottom electrode, and field strength was conducted. Results of these studies show film morphology contributes strongly to film fatigue and film failure prior to reaching 10⁸ fatigue cycles, with increased grain size leading to improved fatigue endurance. Film thickness was also shown to contribute significantly to fatigue, predominantly in PZT on PT films, with films over 1 μm in thickness showing large fatigue after 10⁸ cycles. Films with bottom LNO electrodes demonstrated improved performance over all thickness ranges studied when compared to PT bottom electrodes, exhibiting minimal fatigue after 10⁸ cycles. Advisors/Committee Members: Gibbons, Brady (advisor), Cann, David (committee member).

Subjects/Keywords: Piezoelectric; Thin films

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APA (6^th Edition):

Brookshire, K. L. (2011). Synthesis and characterization of Pb(Zr,Ti)O₃ thin films for microelectromechanical systems. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/25794

Chicago Manual of Style (16^th Edition):

Brookshire, Kirsten L. “Synthesis and characterization of Pb(Zr,Ti)O₃ thin films for microelectromechanical systems.” 2011. Masters Thesis, Oregon State University. Accessed February 27, 2020. http://hdl.handle.net/1957/25794.

MLA Handbook (7^th Edition):

Brookshire, Kirsten L. “Synthesis and characterization of Pb(Zr,Ti)O₃ thin films for microelectromechanical systems.” 2011. Web. 27 Feb 2020.

Vancouver:

Brookshire KL. Synthesis and characterization of Pb(Zr,Ti)O₃ thin films for microelectromechanical systems. [Internet] [Masters thesis]. Oregon State University; 2011. [cited 2020 Feb 27]. Available from: http://hdl.handle.net/1957/25794.

Council of Science Editors:

Brookshire KL. Synthesis and characterization of Pb(Zr,Ti)O₃ thin films for microelectromechanical systems. [Masters Thesis]. Oregon State University; 2011. Available from: http://hdl.handle.net/1957/25794

Indian Institute of Science

20. Shivashankar, P. Analytical Modelling and Non-linear Characterisation of Piezoelectric Materials for Actuation and Vibration Control of Beams.

Degree: 2017, Indian Institute of Science

URL: http://etd.iisc.ernet.in/2005/3990 ; http://etd.iisc.ernet.in/abstracts/4878/G28538-Abs.pdf

► The use of piezoelectric materials for actuation, and vibration suppression of thin beams, is the subject of study in this doctoral thesis. The initial focus… (more)

▼ The use of piezoelectric materials for actuation, and vibration suppression of thin beams, is the subject of study in this doctoral thesis. The initial focus is set on reducing beam vibrations with resistively shunted piezoelectric patches, where the converted electrical energy is dissipated by the resistor to give an additional damping. The amount of additional damping achieved depends on the value of shunted resistor, the dimensions of the piezoelectric, and its location on the substructure. Hence, the resistively shunted piezoelectric-beam was modelled to determine the optimal values, and to examine its dynamics. A multi-modal model was derived based on the Euler-Bernoulli beam theory, and a reduced non-dimensionalized transfer function was obtained from the multi-modal model. The presented model was derived from assumptions which aptly describe the dynamics of the resistively shunted piezoelectric-beam. The aptness of the presented model in representing the system, over the existing models, was evident from the comparison of the analytical predictions with the existing experimental data. With the model derived, the second part of the work deals with determining the value of resistance which would yield maximum amplitude attenuation (referred as the optimal resistance value). A method for obtaining the optimal resistance value from the analytical model, based on the presence of a fixed-point in the amplitude response, exists in the literature. But, this method cannot be used on the presented analytical model, as it includes the base-damping of the structure. Hence, a different approach was adopted to determine the optimal resistance from the analytical model. Analytical results were also validated with experimental results from a cantilever piezoelectric-beam. The amplitude plots of the first, second, and third modes of the piezoelectric-beam exhibited a softening e ect, indicating a non-linear behaviour of the piezoelectric patches. Hence, a non-linear constitutive equation was required to describe the behaviour of the piezoelectric patches. In the third part of the work, a two-step experimental procedure was devised to construct the non-linear constitutive equation of the piezoelectric actuators. In the first step, the piezoelectric patches were short circuited and a family of displacement curves were obtained for the first, second and third modes of the piezoelectric-beam by base excitation. The pro le of backbone curves from these plots were used to identify the type of non-linear terms required to describe the mechanical domain. In the second step, voltage excitation was used to obtain a similar set of displacement curves. A comparison of the profile of the backbone curves, of the displacement frequency response plot, from the voltage excited data with those from the base excited data, lead to the identification of the non-linear electromechanical coupling term. The constitutive equation, which accounts for the non-linear nature, of the piezoelectric actuator contains (apart from the linear terms) a quadratic… Advisors/Committee Members: Kandagal, S B, Venkatraman, Kartik.

Subjects/Keywords: Piezoelectric Materials; Piezoelectric-beams; Piezoelectric Actuators; Piezoelectric Patches; Piezoelectrics; Beams - Vibrationa Control; Areospace Engineering

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APA (6^th Edition):

Shivashankar, P. (2017). Analytical Modelling and Non-linear Characterisation of Piezoelectric Materials for Actuation and Vibration Control of Beams. (Thesis). Indian Institute of Science. Retrieved from http://etd.iisc.ernet.in/2005/3990 ; http://etd.iisc.ernet.in/abstracts/4878/G28538-Abs.pdf

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Shivashankar, P. “Analytical Modelling and Non-linear Characterisation of Piezoelectric Materials for Actuation and Vibration Control of Beams.” 2017. Thesis, Indian Institute of Science. Accessed February 27, 2020. http://etd.iisc.ernet.in/2005/3990 ; http://etd.iisc.ernet.in/abstracts/4878/G28538-Abs.pdf.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Shivashankar, P. “Analytical Modelling and Non-linear Characterisation of Piezoelectric Materials for Actuation and Vibration Control of Beams.” 2017. Web. 27 Feb 2020.

Vancouver:

Shivashankar P. Analytical Modelling and Non-linear Characterisation of Piezoelectric Materials for Actuation and Vibration Control of Beams. [Internet] [Thesis]. Indian Institute of Science; 2017. [cited 2020 Feb 27]. Available from: http://etd.iisc.ernet.in/2005/3990 ; http://etd.iisc.ernet.in/abstracts/4878/G28538-Abs.pdf.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Shivashankar P. Analytical Modelling and Non-linear Characterisation of Piezoelectric Materials for Actuation and Vibration Control of Beams. [Thesis]. Indian Institute of Science; 2017. Available from: http://etd.iisc.ernet.in/2005/3990 ; http://etd.iisc.ernet.in/abstracts/4878/G28538-Abs.pdf

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Rutgers University

21. Ngernchuklin, Piyalak, 1974-. PMN-PT piezoelectric-electrostrictive bi-layer composite actuators.

Degree: PhD, Materials Science and Engineering, 2010, Rutgers University

URL: http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.000053123

►

In the past few decades, significant advances have been achieved to replace the conventional actuators, including hydraulic, shape memory alloy, electromagnetic and linear induction, with… (more)

▼

In the past few decades, significant advances have been achieved to replace the conventional actuators, including hydraulic, shape memory alloy, electromagnetic and linear induction, with piezoelectric actuators since they are light weight and small in size, have precision positioning capabilities, offer a wide range of generative force, consume less power, and provide higher durability and reliability. The strain produced by bulk polycrystalline piezoelectric ceramics and single crystals are typically in the range of 0.1 to 1 %, respectively, which is still low for many applications. Therefore, various strain amplification designs including multilayer, bimorph, unimorph, flextensional actuators (Moonie and cymbal), co-fired and functionally graded ceramics have been proposed to enhance the displacement. In this investigation, Piezoelectric/Electrostrictive Bi-Layer Monolithic Composites (PE-MBLC) were fabricated by co-pressing and co-sintering of the piezoelectric (PMN-PT 65/35: P) and electrostrictive (PMN/PT 90/10: E) powders. Flat and dome shaped of PE-MBLCs were obtained by optimizing processing conditions such as pressing pressure and sintering temperature. In addition, poling conditions of bilayer composite actuators were thoroughly studied to maximize their electromechanical properties. It was found that composites had lower d33eff and Keff values than the calculated values. This was attributed to a significant difference between relative permittivities of P and E materials as well as the presence of induced stresses in both P and E layers after sintering that hindered domain switching within piezoelectric layer during poling. The shape change (planar to dome), electromechanical properties, and actuation performance of PE-MBLC actuators were examined as a function of volume percent of piezoelectric phase. The highest displacement ~15 m was obtained from PE-MBLC actuator with 50 volume % piezoelectric phase due to the transverse strain response of piezoelectric and electrostrictive layers, the geometry of the composites, and the domain reorientation. Two designs of the flextensional actuators were also fabricated. In the first design, two truncated thin metal caps were attached to a flat PE-MBLC. In the second design, dome-shaped PE-MBLC actuators with various volume fraction of piezoelectric phase were attached to a flat metallic plate. The actuation evaluation showed that ~ 21 to 70 m displacement could be achieved by such designs.

Includes abstract

Advisors/Committee Members: Ngernchuklin, Piyalak, 1974- (author), Safari, Ahmad (chair), Danforth, S.C. (internal member), Klein, L.C. (internal member), Jadidian, B. (outside member).

Subjects/Keywords: Piezoelectric devices; Actuators

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APA (6^th Edition):

Ngernchuklin, Piyalak, 1. (2010). PMN-PT piezoelectric-electrostrictive bi-layer composite actuators. (Doctoral Dissertation). Rutgers University. Retrieved from http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.000053123

Chicago Manual of Style (16^th Edition):

Ngernchuklin, Piyalak, 1974-. “PMN-PT piezoelectric-electrostrictive bi-layer composite actuators.” 2010. Doctoral Dissertation, Rutgers University. Accessed February 27, 2020. http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.000053123.

MLA Handbook (7^th Edition):

Ngernchuklin, Piyalak, 1974-. “PMN-PT piezoelectric-electrostrictive bi-layer composite actuators.” 2010. Web. 27 Feb 2020.

Vancouver:

Ngernchuklin, Piyalak 1. PMN-PT piezoelectric-electrostrictive bi-layer composite actuators. [Internet] [Doctoral dissertation]. Rutgers University; 2010. [cited 2020 Feb 27]. Available from: http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.000053123.

Council of Science Editors:

Ngernchuklin, Piyalak 1. PMN-PT piezoelectric-electrostrictive bi-layer composite actuators. [Doctoral Dissertation]. Rutgers University; 2010. Available from: http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.000053123

University of Texas – Austin

22. Joseph, Nicholas John. A comparison of models for a piezoelectric 31-mode segmented cylindrical transducer.

Degree: MSin Engineering, Mechanical Engineering, 2013, University of Texas – Austin

URL: http://hdl.handle.net/2152/23565

► Piezoelectric transducers with cylindrical geometry are often designed to operate in a radial “breathing” mode. In order to tune their performance in a cost effective… (more)

Subjects/Keywords: Transducers; Acoustics; Piezoelectric

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APA (6^th Edition):

Joseph, N. J. (2013). A comparison of models for a piezoelectric 31-mode segmented cylindrical transducer. (Masters Thesis). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/23565

Chicago Manual of Style (16^th Edition):

Joseph, Nicholas John. “A comparison of models for a piezoelectric 31-mode segmented cylindrical transducer.” 2013. Masters Thesis, University of Texas – Austin. Accessed February 27, 2020. http://hdl.handle.net/2152/23565.

MLA Handbook (7^th Edition):

Joseph, Nicholas John. “A comparison of models for a piezoelectric 31-mode segmented cylindrical transducer.” 2013. Web. 27 Feb 2020.

Vancouver:

Joseph NJ. A comparison of models for a piezoelectric 31-mode segmented cylindrical transducer. [Internet] [Masters thesis]. University of Texas – Austin; 2013. [cited 2020 Feb 27]. Available from: http://hdl.handle.net/2152/23565.

Council of Science Editors:

Joseph NJ. A comparison of models for a piezoelectric 31-mode segmented cylindrical transducer. [Masters Thesis]. University of Texas – Austin; 2013. Available from: http://hdl.handle.net/2152/23565

University of Texas – Austin

23. Garcia, Juan Elias. Piezoelectric transducer built-in self-test for logging while drilling instrument sensor evaluation at rig site.

Degree: MSin Engineering, Electrical and Computer Engineering, 2014, University of Texas – Austin

URL: http://hdl.handle.net/2152/26344

► Logging While Drilling (LWD) instruments used in oil and gas exploration are subjected to extreme environmental conditions that make reliable operation a major challenge. The… (more)

Subjects/Keywords: Piezoelectric Sensor; BIST

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APA (6^th Edition):

Garcia, J. E. (2014). Piezoelectric transducer built-in self-test for logging while drilling instrument sensor evaluation at rig site. (Masters Thesis). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/26344

Chicago Manual of Style (16^th Edition):

Garcia, Juan Elias. “Piezoelectric transducer built-in self-test for logging while drilling instrument sensor evaluation at rig site.” 2014. Masters Thesis, University of Texas – Austin. Accessed February 27, 2020. http://hdl.handle.net/2152/26344.

MLA Handbook (7^th Edition):

Garcia, Juan Elias. “Piezoelectric transducer built-in self-test for logging while drilling instrument sensor evaluation at rig site.” 2014. Web. 27 Feb 2020.

Vancouver:

Garcia JE. Piezoelectric transducer built-in self-test for logging while drilling instrument sensor evaluation at rig site. [Internet] [Masters thesis]. University of Texas – Austin; 2014. [cited 2020 Feb 27]. Available from: http://hdl.handle.net/2152/26344.

Council of Science Editors:

Garcia JE. Piezoelectric transducer built-in self-test for logging while drilling instrument sensor evaluation at rig site. [Masters Thesis]. University of Texas – Austin; 2014. Available from: http://hdl.handle.net/2152/26344

NSYSU

24. Chen, Ting-chun. Determination of Piezoelectric Parameters from Measured Natural Frequencies of a Piezoelectric Circular Plate.

Degree: Master, Mechanical and Electro-Mechanical Engineering, 2010, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0719110-175233

► Due to the complexity of electro-elastic coupling characteristics in piezoelectric material, some of the elastic, dielectric and piezoelectric parameters are difficult to be measured. Usually,… (more)

Subjects/Keywords: piezoelectric constants; genetic algorithm; piezoelectric material; vibration; elastic constants; piezoelectric circular plate; dielectric constants

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APA (6^th Edition):

Chen, T. (2010). Determination of Piezoelectric Parameters from Measured Natural Frequencies of a Piezoelectric Circular Plate. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0719110-175233

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Chen, Ting-chun. “Determination of Piezoelectric Parameters from Measured Natural Frequencies of a Piezoelectric Circular Plate.” 2010. Thesis, NSYSU. Accessed February 27, 2020. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0719110-175233.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Chen, Ting-chun. “Determination of Piezoelectric Parameters from Measured Natural Frequencies of a Piezoelectric Circular Plate.” 2010. Web. 27 Feb 2020.

Vancouver:

Chen T. Determination of Piezoelectric Parameters from Measured Natural Frequencies of a Piezoelectric Circular Plate. [Internet] [Thesis]. NSYSU; 2010. [cited 2020 Feb 27]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0719110-175233.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Chen T. Determination of Piezoelectric Parameters from Measured Natural Frequencies of a Piezoelectric Circular Plate. [Thesis]. NSYSU; 2010. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0719110-175233

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Hong Kong

25. Fung, Sze-wei. Modeling the rosen type piezoelectric transformer for powerconverters.

Degree: M. Phil., 2004, University of Hong Kong

URL: Fung, S. [馮時維]. (2004). Modeling the rosen type piezoelectric transformer for power converters. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b3145122 ; http://dx.doi.org/10.5353/th_b3145122 ; http://hdl.handle.net/10722/39988

published_or_final_version

abstract

Electrical and Electronic Engineering

Master

Master of Philosophy

Advisors/Committee Members: Pong, MH.

Subjects/Keywords: Piezoelectric transducers.

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APA (6^th Edition):

Fung, S. (2004). Modeling the rosen type piezoelectric transformer for powerconverters. (Masters Thesis). University of Hong Kong. Retrieved from Fung, S. [馮時維]. (2004). Modeling the rosen type piezoelectric transformer for power converters. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b3145122 ; http://dx.doi.org/10.5353/th_b3145122 ; http://hdl.handle.net/10722/39988

Chicago Manual of Style (16^th Edition):

Fung, Sze-wei. “Modeling the rosen type piezoelectric transformer for powerconverters.” 2004. Masters Thesis, University of Hong Kong. Accessed February 27, 2020. Fung, S. [馮時維]. (2004). Modeling the rosen type piezoelectric transformer for power converters. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b3145122 ; http://dx.doi.org/10.5353/th_b3145122 ; http://hdl.handle.net/10722/39988.

MLA Handbook (7^th Edition):

Fung, Sze-wei. “Modeling the rosen type piezoelectric transformer for powerconverters.” 2004. Web. 27 Feb 2020.

Vancouver:

Fung S. Modeling the rosen type piezoelectric transformer for powerconverters. [Internet] [Masters thesis]. University of Hong Kong; 2004. [cited 2020 Feb 27]. Available from: Fung, S. [馮時維]. (2004). Modeling the rosen type piezoelectric transformer for power converters. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b3145122 ; http://dx.doi.org/10.5353/th_b3145122 ; http://hdl.handle.net/10722/39988.

Council of Science Editors:

Fung S. Modeling the rosen type piezoelectric transformer for powerconverters. [Masters Thesis]. University of Hong Kong; 2004. Available from: Fung, S. [馮時維]. (2004). Modeling the rosen type piezoelectric transformer for power converters. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b3145122 ; http://dx.doi.org/10.5353/th_b3145122 ; http://hdl.handle.net/10722/39988

Texas Tech University

26. Koven, Robert. Vibration energy harvesting with a base mounted piezoelectric transducer.

Degree: MSin Electrical Engineering, Electrical Engineering, 2016, Texas Tech University

URL: http://hdl.handle.net/2346/72361

► Piezoelectric vibration energy harvesters often consist of a cantilevered beam composed of a support layer and one or two piezoelectric layers with a tip mass.… (more)

Subjects/Keywords: Piezoelectric; Energy Harvester; Vibration

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APA (6^th Edition):

Koven, R. (2016). Vibration energy harvesting with a base mounted piezoelectric transducer. (Masters Thesis). Texas Tech University. Retrieved from http://hdl.handle.net/2346/72361

Chicago Manual of Style (16^th Edition):

Koven, Robert. “Vibration energy harvesting with a base mounted piezoelectric transducer.” 2016. Masters Thesis, Texas Tech University. Accessed February 27, 2020. http://hdl.handle.net/2346/72361.

MLA Handbook (7^th Edition):

Koven, Robert. “Vibration energy harvesting with a base mounted piezoelectric transducer.” 2016. Web. 27 Feb 2020.

Vancouver:

Koven R. Vibration energy harvesting with a base mounted piezoelectric transducer. [Internet] [Masters thesis]. Texas Tech University; 2016. [cited 2020 Feb 27]. Available from: http://hdl.handle.net/2346/72361.

Council of Science Editors:

Koven R. Vibration energy harvesting with a base mounted piezoelectric transducer. [Masters Thesis]. Texas Tech University; 2016. Available from: http://hdl.handle.net/2346/72361

Penn State University

27. Gosain, Rohan. PIEZOELECTRIC PUMP USING CYMBAL TRANSDUCER.

Degree: MS, Electrical Engineering, 2010, Penn State University

URL: https://etda.libraries.psu.edu/catalog/10737

► This thesis treats an innovative piezoelectric pump based on one of the piezoelectric actuators, the ‘cymbal’. The performance analysis of a miniaturized, ultrasonic, valve less… (more)

Subjects/Keywords: PIEZOELECTRIC PUMP CYMBAL TRANSDUCER ULTRASONIC

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APA (6^th Edition):

Gosain, R. (2010). PIEZOELECTRIC PUMP USING CYMBAL TRANSDUCER. (Masters Thesis). Penn State University. Retrieved from https://etda.libraries.psu.edu/catalog/10737

Chicago Manual of Style (16^th Edition):

Gosain, Rohan. “PIEZOELECTRIC PUMP USING CYMBAL TRANSDUCER.” 2010. Masters Thesis, Penn State University. Accessed February 27, 2020. https://etda.libraries.psu.edu/catalog/10737.

MLA Handbook (7^th Edition):

Gosain, Rohan. “PIEZOELECTRIC PUMP USING CYMBAL TRANSDUCER.” 2010. Web. 27 Feb 2020.

Vancouver:

Gosain R. PIEZOELECTRIC PUMP USING CYMBAL TRANSDUCER. [Internet] [Masters thesis]. Penn State University; 2010. [cited 2020 Feb 27]. Available from: https://etda.libraries.psu.edu/catalog/10737.

Council of Science Editors:

Gosain R. PIEZOELECTRIC PUMP USING CYMBAL TRANSDUCER. [Masters Thesis]. Penn State University; 2010. Available from: https://etda.libraries.psu.edu/catalog/10737

Penn State University

28. Hirsh, Andrew. Design, Fabrication, and Testing of a Piezoelectric T-Beam Actuator.

Degree: MS, Mechanical Engineering, 2008, Penn State University

URL: https://etda.libraries.psu.edu/catalog/8937

► This thesis introduces a novel T-beam actuator fabricated using a precision dicing saw. Bulk PZT is diced to produce cantilevered beams with T-shaped cross sections.… (more)

Subjects/Keywords: T-Beam; Actuator; Piezoelectric

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APA (6^th Edition):

Hirsh, A. (2008). Design, Fabrication, and Testing of a Piezoelectric T-Beam Actuator. (Masters Thesis). Penn State University. Retrieved from https://etda.libraries.psu.edu/catalog/8937

Chicago Manual of Style (16^th Edition):

Hirsh, Andrew. “Design, Fabrication, and Testing of a Piezoelectric T-Beam Actuator.” 2008. Masters Thesis, Penn State University. Accessed February 27, 2020. https://etda.libraries.psu.edu/catalog/8937.

MLA Handbook (7^th Edition):

Hirsh, Andrew. “Design, Fabrication, and Testing of a Piezoelectric T-Beam Actuator.” 2008. Web. 27 Feb 2020.

Vancouver:

Hirsh A. Design, Fabrication, and Testing of a Piezoelectric T-Beam Actuator. [Internet] [Masters thesis]. Penn State University; 2008. [cited 2020 Feb 27]. Available from: https://etda.libraries.psu.edu/catalog/8937.

Council of Science Editors:

Hirsh A. Design, Fabrication, and Testing of a Piezoelectric T-Beam Actuator. [Masters Thesis]. Penn State University; 2008. Available from: https://etda.libraries.psu.edu/catalog/8937

Penn State University

29. Zhang, Zheqian. DESIGN, FABRICATION AND CHARACTERIZATION OF MICROMACHINED PIEZOELECTRIC T-BEAM TRANSDUCERS.

Degree: MS, Mechanical Engineering, 2010, Penn State University

URL: https://etda.libraries.psu.edu/catalog/10723

► Ferroelectric materials such as PbZr0.52Ti0.48O3 (PZT 52/48) have attractive electromechanical properties for realizing micromachined sensors and actuators because of their large piezoelectric coefficients and electromechanical… (more)

Subjects/Keywords: multifunctional transducers; PZT; piezoelectric; MEMS

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APA (6^th Edition):

Zhang, Z. (2010). DESIGN, FABRICATION AND CHARACTERIZATION OF MICROMACHINED PIEZOELECTRIC T-BEAM TRANSDUCERS. (Masters Thesis). Penn State University. Retrieved from https://etda.libraries.psu.edu/catalog/10723

Chicago Manual of Style (16^th Edition):

Zhang, Zheqian. “DESIGN, FABRICATION AND CHARACTERIZATION OF MICROMACHINED PIEZOELECTRIC T-BEAM TRANSDUCERS.” 2010. Masters Thesis, Penn State University. Accessed February 27, 2020. https://etda.libraries.psu.edu/catalog/10723.

MLA Handbook (7^th Edition):

Zhang, Zheqian. “DESIGN, FABRICATION AND CHARACTERIZATION OF MICROMACHINED PIEZOELECTRIC T-BEAM TRANSDUCERS.” 2010. Web. 27 Feb 2020.

Vancouver:

Zhang Z. DESIGN, FABRICATION AND CHARACTERIZATION OF MICROMACHINED PIEZOELECTRIC T-BEAM TRANSDUCERS. [Internet] [Masters thesis]. Penn State University; 2010. [cited 2020 Feb 27]. Available from: https://etda.libraries.psu.edu/catalog/10723.

Council of Science Editors:

Zhang Z. DESIGN, FABRICATION AND CHARACTERIZATION OF MICROMACHINED PIEZOELECTRIC T-BEAM TRANSDUCERS. [Masters Thesis]. Penn State University; 2010. Available from: https://etda.libraries.psu.edu/catalog/10723

University of Manchester

30. Qi, Shaofan. Investigation of a novel multiresonant beam energy harvester and a complex conjugate matching circuit.

Degree: PhD, 2011, University of Manchester

URL: https://www.research.manchester.ac.uk/portal/en/theses/investigation-of-a-novel-multiresonant-beam-energy-harvester-and-a-complex-conjugate-matching-circuit(0dff7705-b944-4618-bc77-c4e356e3d054).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.538476

► The aim of the work described in this thesis is firstly to improve the collection of vibration energy for piezoelectric cantilever harvesters, by a mechanical… (more)

▼ The aim of the work described in this thesis is firstly to improve the collection of vibration energy for piezoelectric cantilever harvesters, by a mechanical technique, so that the devices can harvest energy over a wider bandwidth. Secondly to investigate a new circuit topology for achieving complex conjugate load matching to the piezoelectric harvester. The thesis has been divided into two parts - the mechanical approach and the electrical approach. For the mechanical approach, a novel multiresonant beam, comprising piezoelectric fiber composites on a clamped-clamped beam and side mounted cantilevers, was proposed. The side cantilevers are tuned by tip masses to be resonant at different frequencies. A Rayleigh-Ritz model was developed to predict the vibration response of the proposed model multiresonant beam. This model showed that the bandwidth of the multiresonant beam was increased over that of a single cantilever harvester. A multiresonant beam for energy harvesting was experimentally tested and compared with a single cantilever energy harvester. The transmissibility and voltage responses were investigated, the beam showed a wide frequency response between 14.5Hz and 31Hz, whereas the single cantilever only showed one resonant frequency. Therefore the multiresonant beam system is feasible for wide band energy harvesting. For the electrical approach, the task was to investigate complex conjugate impedance matching for the piezoelectric energy harvesters, so that the output impedance from the piezoelectric harvester can be reduced, and maximum energy extracted from the device with a possibility of frequency tuning. A new amplified inductor circuit was proposed to enable the capacitive output impedance of the piezoelectric device to be cancelled. Experimental and software simulations are provided to verify the theoretical predictions. A prototype amplified inductor circuit was simulated and tested. The results showed that a variable effective inductance was achieved. However the circuit is lossy due to imperfections within the system, and needs further work to eliminate these imperfections.

Subjects/Keywords: 621.31; piezoelectric; energy harvesting

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APA (6^th Edition):

Qi, S. (2011). Investigation of a novel multiresonant beam energy harvester and a complex conjugate matching circuit. (Doctoral Dissertation). University of Manchester. Retrieved from https://www.research.manchester.ac.uk/portal/en/theses/investigation-of-a-novel-multiresonant-beam-energy-harvester-and-a-complex-conjugate-matching-circuit(0dff7705-b944-4618-bc77-c4e356e3d054).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.538476

Chicago Manual of Style (16^th Edition):

Qi, Shaofan. “Investigation of a novel multiresonant beam energy harvester and a complex conjugate matching circuit.” 2011. Doctoral Dissertation, University of Manchester. Accessed February 27, 2020. https://www.research.manchester.ac.uk/portal/en/theses/investigation-of-a-novel-multiresonant-beam-energy-harvester-and-a-complex-conjugate-matching-circuit(0dff7705-b944-4618-bc77-c4e356e3d054).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.538476.

MLA Handbook (7^th Edition):

Qi, Shaofan. “Investigation of a novel multiresonant beam energy harvester and a complex conjugate matching circuit.” 2011. Web. 27 Feb 2020.

Vancouver:

Qi S. Investigation of a novel multiresonant beam energy harvester and a complex conjugate matching circuit. [Internet] [Doctoral dissertation]. University of Manchester; 2011. [cited 2020 Feb 27]. Available from: https://www.research.manchester.ac.uk/portal/en/theses/investigation-of-a-novel-multiresonant-beam-energy-harvester-and-a-complex-conjugate-matching-circuit(0dff7705-b944-4618-bc77-c4e356e3d054).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.538476.

Council of Science Editors:

Qi S. Investigation of a novel multiresonant beam energy harvester and a complex conjugate matching circuit. [Doctoral Dissertation]. University of Manchester; 2011. Available from: https://www.research.manchester.ac.uk/portal/en/theses/investigation-of-a-novel-multiresonant-beam-energy-harvester-and-a-complex-conjugate-matching-circuit(0dff7705-b944-4618-bc77-c4e356e3d054).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.538476

Open Access Theses and Dissertations