subject:(electric permittivity)

York University

1. Dumont, Antoine. Synthesis, Characterization and Application of Barium Titanate Particles in Light Emitting Devices.

Degree: MSc -MS, Physics And Astronomy, 2016, York University

► The search for low-cost technologies that reduces our energy consumption is a priority in our struggle for the well-being of our environment. This project had… (more)

Subjects/Keywords: Materials Science; Barium titanate; Electroluminescence; Screen-printing; Dielectric; Electric permittivity; Doping; Sol-gel synthesis

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APA (6^th Edition):

Dumont, A. (2016). Synthesis, Characterization and Application of Barium Titanate Particles in Light Emitting Devices. (Masters Thesis). York University. Retrieved from http://hdl.handle.net/10315/32333

Chicago Manual of Style (16^th Edition):

Dumont, Antoine. “Synthesis, Characterization and Application of Barium Titanate Particles in Light Emitting Devices.” 2016. Masters Thesis, York University. Accessed January 23, 2021. http://hdl.handle.net/10315/32333.

MLA Handbook (7^th Edition):

Dumont, Antoine. “Synthesis, Characterization and Application of Barium Titanate Particles in Light Emitting Devices.” 2016. Web. 23 Jan 2021.

Vancouver:

Dumont A. Synthesis, Characterization and Application of Barium Titanate Particles in Light Emitting Devices. [Internet] [Masters thesis]. York University; 2016. [cited 2021 Jan 23]. Available from: http://hdl.handle.net/10315/32333.

Council of Science Editors:

Dumont A. Synthesis, Characterization and Application of Barium Titanate Particles in Light Emitting Devices. [Masters Thesis]. York University; 2016. Available from: http://hdl.handle.net/10315/32333

2. Porfirio, Tatiane Cristina. Preparação e caracterização microestrutural e dielétrica da perovsquita CaCu3Ti4O12.

Degree: PhD, Tecnologia Nuclear - Materiais, 2015, University of São Paulo

URL: http://www.teses.usp.br/teses/disponiveis/85/85134/tde-17092015-090949/ ;

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Neste trabalho pós de CaCu3Ti4O12 foram preparados por reação em estado sólido e por técnicas de solução: complexação de cátions e coprecipitação dos oxalatos. Foram… (more)

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Neste trabalho pós de CaCu3Ti4O12 foram preparados por reação em estado sólido e por técnicas de solução: complexação de cátions e coprecipitação dos oxalatos. Foram realizados estudos de formação de fase, densificação e propriedades dielétricas das cerâmicas sinterizadas. Para efeito comparativo, ta is propriedades foram determinadas em amostras puras e contendo dissilicato de lítio (LSO) e fluoreto de lítio (LiF) como aditivos de sinterização. O principal objetivo foi verificar o efeito do uso dos diferentes aditivos de sinterização na microestrutura, densificação e propriedades dielétricas do CCTO. Os principais resultados revelaram que pós preparados por técnicas de solução apresentam fase única após calcinação em condições selecionadas. Foi verificado que os aditivos influenciam na densificação, possibilitando obter cerâmicas com 95% da densidade teórica do CCTO a 1025°C. As amostras preparadas por diferentes técnicas apresentam propriedades similares, com exceção das características microestruturais. A permissividade elétrica determinada à temperatura ambiente é da ordem de 104 independentemente do método de síntese. As menores perdas dielétricas foram obtidas para amostras contendo LiF como aditivo de sinterização.

In this work the effects of the method of synthesis and sintering additives on the microstructure and dielectric properties of CCTO were investigated. Powder mixtures were prepared by the cation complexation and coprecipitation methods, and by mixing of the starting oxides, for comparison purposes. Lithium dissilicate (LSO) and lithium fluoride (LiF) were used as sintering aids. The main results revealed that powders prepared by solution techniques have single phase after calcination at selected conditions. The additives were found to influence the densification allowing for obtaining high relative density (≥ 95%) at 1025ºC. Specimens prepared by different methods show similar properties except on microstructure features. The electric permittivity is of the order of 104 for all investigated specimens independent on the method of synthesis. The dielectric loss is found to be lower for specimens prepared with LiF as sintering aid.

Advisors/Committee Members: Muccillo, Eliana Navarro dos Santos.

Subjects/Keywords: additives; aditivos; CCTO; CCTO; chemical synthesis; dielectric loss; electric permittivity; permissividade elétrica; síntese química, perdas dielétricas

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APA (6^th Edition):

Porfirio, T. C. (2015). Preparação e caracterização microestrutural e dielétrica da perovsquita CaCu3Ti4O12. (Doctoral Dissertation). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/85/85134/tde-17092015-090949/ ;

Chicago Manual of Style (16^th Edition):

Porfirio, Tatiane Cristina. “Preparação e caracterização microestrutural e dielétrica da perovsquita CaCu3Ti4O12.” 2015. Doctoral Dissertation, University of São Paulo. Accessed January 23, 2021. http://www.teses.usp.br/teses/disponiveis/85/85134/tde-17092015-090949/ ;.

MLA Handbook (7^th Edition):

Porfirio, Tatiane Cristina. “Preparação e caracterização microestrutural e dielétrica da perovsquita CaCu3Ti4O12.” 2015. Web. 23 Jan 2021.

Vancouver:

Porfirio TC. Preparação e caracterização microestrutural e dielétrica da perovsquita CaCu3Ti4O12. [Internet] [Doctoral dissertation]. University of São Paulo; 2015. [cited 2021 Jan 23]. Available from: http://www.teses.usp.br/teses/disponiveis/85/85134/tde-17092015-090949/ ;.

Council of Science Editors:

Porfirio TC. Preparação e caracterização microestrutural e dielétrica da perovsquita CaCu3Ti4O12. [Doctoral Dissertation]. University of São Paulo; 2015. Available from: http://www.teses.usp.br/teses/disponiveis/85/85134/tde-17092015-090949/ ;

Texas A&M University

3. Elkholy, Mohamed Moustafa Mohamed Attia. Circuits and Systems for On-Chip RF Chemical Sensors and RF FDD Duplexers.

Degree: PhD, Electrical Engineering, 2016, Texas A&M University

URL: http://hdl.handle.net/1969.1/158977

► Integrating RF bio-chemical sensors and RF duplexers helps to reduce cost and area in the current applications. Furthermore, new applications can exist based on the… (more)

▼ Integrating RF bio-chemical sensors and RF duplexers helps to reduce cost and area in the current applications. Furthermore, new applications can exist based on the large scale integration of these crucial blocks. This dissertation addresses the integration of RF bio-chemical sensors and RF duplexers by proposing these initiatives. A low power integrated LC-oscillator-based broadband dielectric spectroscopy (BDS) system is presented. The real relative permittivity ε’r is measured as a shift in the oscillator frequency using an on-chip frequency-to-digital converter (FDC). The imaginary relative permittivity ε”r increases the losses of the oscillator tank which mandates a higher dc biasing current to preserve the same oscillation amplitude. An amplitude-locked loop (ALL) is used to fix the amplitude and linearize the relation between the oscillator bias current and ε”r. The proposed BDS system employs a sensing oscillator and a reference oscillator where correlated double sampling (CDS) is used to mitigate the impact of flicker noise, temperature variations and frequency drifts. A prototype is implemented in 0.18 µm CMOS process with total chip area of 6.24 mm² to operate in 1-6 GHz range using three dual bands LC oscillators. The achieved standard deviation in the air is 2.1 ppm for frequency reading and 110 ppm for current reading. A tunable integrated electrical balanced duplexer (EBD) is presented as a compact alternative to multiple bulky SAW and BAW duplexers in 3G/4G cellular transceivers. A balancing network creates a replica of the transmitter signal for cancellation at the input of a single-ended low noise amplifier (LNA) to isolate the receive path from the transmitter. The proposed passive EBD is based on a cross-connected transformer topology without the need of any extra balun at the antenna side. The duplexer achieves around 50 dB TX-RX isolation within 1.6-2.2 GHz range up to 22 dBm. The cascaded noise figure of the duplexer and LNA is 6.5 dB, and TX insertion loss (TXIL) of the duplexer is about 3.2 dB. The duplexer and LNA are implemented in 0.18 µm CMOS process and occupy an active area of 0.35 mm². Advisors/Committee Members: Entesari, Kamran (advisor), Palermo, Samuel (committee member), Zou, Jun (committee member), El-Halwagi, Mahmoud (committee member).

Subjects/Keywords: Chemical sensor; biochemical; complex permittivity; LC-DCO; oscillator-based sensor; duplexer; electric balance duplexer; 3G communications

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APA (6^th Edition):

Elkholy, M. M. M. A. (2016). Circuits and Systems for On-Chip RF Chemical Sensors and RF FDD Duplexers. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/158977

Chicago Manual of Style (16^th Edition):

Elkholy, Mohamed Moustafa Mohamed Attia. “Circuits and Systems for On-Chip RF Chemical Sensors and RF FDD Duplexers.” 2016. Doctoral Dissertation, Texas A&M University. Accessed January 23, 2021. http://hdl.handle.net/1969.1/158977.

MLA Handbook (7^th Edition):

Elkholy, Mohamed Moustafa Mohamed Attia. “Circuits and Systems for On-Chip RF Chemical Sensors and RF FDD Duplexers.” 2016. Web. 23 Jan 2021.

Vancouver:

Elkholy MMMA. Circuits and Systems for On-Chip RF Chemical Sensors and RF FDD Duplexers. [Internet] [Doctoral dissertation]. Texas A&M University; 2016. [cited 2021 Jan 23]. Available from: http://hdl.handle.net/1969.1/158977.

Council of Science Editors:

Elkholy MMMA. Circuits and Systems for On-Chip RF Chemical Sensors and RF FDD Duplexers. [Doctoral Dissertation]. Texas A&M University; 2016. Available from: http://hdl.handle.net/1969.1/158977

Cranfield University

4. Wilson, Stephen A. Electric-field structuring of piezoelectric composite materials.

Degree: PhD, 1999, Cranfield University

URL: http://dspace.lib.cranfield.ac.uk/handle/1826/3373 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.323927

► Piezoelectric composite materials, consisting of a ferroelectric ceramic in an electrically-inactive polymer matrix, have been shown to greatly outperform single phase materials for certain applications.… (more)

▼ Piezoelectric composite materials, consisting of a ferroelectric ceramic in an electrically-inactive polymer matrix, have been shown to greatly outperform single phase materials for certain applications. A new assembly technique, which electrically controls the spatial distribution of the ceramic within the polymer, promises to enhance the sensitivity of 0-3 type piezoelectric composites. The materials so-produced have a quasi 1-3 structure and it is intended that they will exhibit some of the advantages of 1- 3 piezoelectric composites, whilst retaining the simplicity of 0-3 manufacturing. The electric field structuring technique exploits the electrokinetic phenomenon of dielectrophoresis, which is responsible for the electrorheological effect. When a suspension of ceramic particles in an insulating fluid is exposed to a moderate AC electric field, the particles polarize and as a result they exhibit a mutually attractive force. Under suitable conditions the particles assemble into 'pearl-chains', 'fibrils' or columns, oriented parallel to the applied field. If the fluid is a resin pre-polymer, this can then be cured and the newly formed structures frozen into place to form a composite material with anisotropic properties. The key process parameters are explored and the implications of employing this method to produce technologically useful materials are discussed. It is demonstrated, for the first time, that dielectrophoresis can be used to induce anisotropic dielectric and piezoelectric properties in 55%vol. fraction ceramic/polymer composites. A model composite system of pure lead titanate in an epoxy resin is considered in basic detail. A method of producing a lead zirconate titanate (PZT) powder with a narrow particle size distribution, by flux growth, has been shown to be effective. New concepts in multiphase composites are introduced, whereby chains are formed within the confines of a second immiscible fluid or where particles of two different materials are mixed in a suspension, each material having its own 'polarization signature'.

Subjects/Keywords: 530.41; ELECTROPHORESIS; PIEZOELECTRICITY; ELECTRIC FIELDS; COMPOSITE MATERIALS; PERMITTIVITY

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APA (6^th Edition):

Wilson, S. A. (1999). Electric-field structuring of piezoelectric composite materials. (Doctoral Dissertation). Cranfield University. Retrieved from http://dspace.lib.cranfield.ac.uk/handle/1826/3373 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.323927

Chicago Manual of Style (16^th Edition):

Wilson, Stephen A. “Electric-field structuring of piezoelectric composite materials.” 1999. Doctoral Dissertation, Cranfield University. Accessed January 23, 2021. http://dspace.lib.cranfield.ac.uk/handle/1826/3373 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.323927.

MLA Handbook (7^th Edition):

Wilson, Stephen A. “Electric-field structuring of piezoelectric composite materials.” 1999. Web. 23 Jan 2021.

Vancouver:

Wilson SA. Electric-field structuring of piezoelectric composite materials. [Internet] [Doctoral dissertation]. Cranfield University; 1999. [cited 2021 Jan 23]. Available from: http://dspace.lib.cranfield.ac.uk/handle/1826/3373 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.323927.

Council of Science Editors:

Wilson SA. Electric-field structuring of piezoelectric composite materials. [Doctoral Dissertation]. Cranfield University; 1999. Available from: http://dspace.lib.cranfield.ac.uk/handle/1826/3373 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.323927

University of Florida

5. Lai, Tzung-Han. Delocalization of Charge Transfer Excitons in Polymer Solar Cells.

Degree: PhD, Materials Science and Engineering, 2015, University of Florida

URL: https://ufdc.ufl.edu/UFE0047672

► Organic photovoltaics (OPVs), due to its light weight, mechanical flexibility and solution processability, have been the focus of research for the past decade. Power conversion… (more)

Subjects/Keywords: Annealing; Charge transfer; Electric fields; Electrons; Energy gaps; Excitons; Fullerenes; Permittivity; Photovoltaic cells; Polymers; organic – photovoltaic – semiconductor

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APA (6^th Edition):

Lai, T. (2015). Delocalization of Charge Transfer Excitons in Polymer Solar Cells. (Doctoral Dissertation). University of Florida. Retrieved from https://ufdc.ufl.edu/UFE0047672

Chicago Manual of Style (16^th Edition):

Lai, Tzung-Han. “Delocalization of Charge Transfer Excitons in Polymer Solar Cells.” 2015. Doctoral Dissertation, University of Florida. Accessed January 23, 2021. https://ufdc.ufl.edu/UFE0047672.

MLA Handbook (7^th Edition):

Lai, Tzung-Han. “Delocalization of Charge Transfer Excitons in Polymer Solar Cells.” 2015. Web. 23 Jan 2021.

Vancouver:

Lai T. Delocalization of Charge Transfer Excitons in Polymer Solar Cells. [Internet] [Doctoral dissertation]. University of Florida; 2015. [cited 2021 Jan 23]. Available from: https://ufdc.ufl.edu/UFE0047672.

Council of Science Editors:

Lai T. Delocalization of Charge Transfer Excitons in Polymer Solar Cells. [Doctoral Dissertation]. University of Florida; 2015. Available from: https://ufdc.ufl.edu/UFE0047672

University of Florida

6. Zhou, Zhi. Scalable Synthesis of Ferroelectric Nanowires and Textured Films.

Degree: PhD, Materials Science and Engineering, 2014, University of Florida

URL: https://ufdc.ufl.edu/UFE0047419

► Ferroelectric materials are critical in modern electronic devices such as ferroelectric random access memory (FRAM), capacitors and microelectromechanical systems (MEMS) because of their high dielectric… (more)

Subjects/Keywords: Coupling coefficients; Crop harvesting; Crystals; Electric fields; Energy; Ferroelectric materials; Nanocomposites; Permittivity; Perovskites; Thin films; ferroelectric – film – hydrothermal – nanowire – piezoelectric – textured

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APA (6^th Edition):

Zhou, Z. (2014). Scalable Synthesis of Ferroelectric Nanowires and Textured Films. (Doctoral Dissertation). University of Florida. Retrieved from https://ufdc.ufl.edu/UFE0047419

Chicago Manual of Style (16^th Edition):

Zhou, Zhi. “Scalable Synthesis of Ferroelectric Nanowires and Textured Films.” 2014. Doctoral Dissertation, University of Florida. Accessed January 23, 2021. https://ufdc.ufl.edu/UFE0047419.

MLA Handbook (7^th Edition):

Zhou, Zhi. “Scalable Synthesis of Ferroelectric Nanowires and Textured Films.” 2014. Web. 23 Jan 2021.

Vancouver:

Zhou Z. Scalable Synthesis of Ferroelectric Nanowires and Textured Films. [Internet] [Doctoral dissertation]. University of Florida; 2014. [cited 2021 Jan 23]. Available from: https://ufdc.ufl.edu/UFE0047419.

Council of Science Editors:

Zhou Z. Scalable Synthesis of Ferroelectric Nanowires and Textured Films. [Doctoral Dissertation]. University of Florida; 2014. Available from: https://ufdc.ufl.edu/UFE0047419

Luleå University of Technology

7. Karlsson, Christian A. M. Sensus Aquae in Ferrum ac Air : Karakterisering av elektriska egenskaper hos ett fuktmätnings system.

Degree: 2011, Luleå University of Technology

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-54848

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Fast precise moisture measurement in mineral process plants, has long been a difficult problem. In this master thesis a foundation for a new way… (more)

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Fast precise moisture measurement in mineral process plants, has long been a difficult problem. In this master thesis a foundation for a new way of measurement using transmission line theory, is laid out. Macroscopic electro-magnetic properties of the measured sample can be linked to those of the individual constituents of the sample. Thus one is believed to be able to do a precise estimate of the amount of moisture in a sample. In our case the samples are moist magnetite concentrate. The characterization of sample macroscopic electro-magnetic properties is done by using a coaxial cell, performing frequency spectra measurement. In this master thesis, the electrical behavior that links the measured data to the macroscopic electro-magnetic properties is examined. It exists two setups, one inductive and one capacitive. The DC resistivity of the moist magnetite concentrate is determined and some interesting phenomena, suggested to be self potential were discovered. This phenomenon is in general known from geochemistry of mineral rich clays. This made the measurements of resistivity tricky to perform, some measurements were achieved and a new relation between moisture of the moist magnetite concentrate and resistivity is presented. Studies have been performed on the history of attempts of solving this problem, as well as current relevant research. Reference samples have been prepared in a geotechnical laboratory. Impedance frequency behavior of the measurement equipment is measured and presented, with different curves for different moisture content. From these measurements it is obvious that the moisture affects the impedance of the measurement equipment and thus it is possible to use this method to measure moisture content, if one can determine the electrical model which describes the measurement system. A few equivalent circuits of transmission lines have been discussed, and one was chosen to represent the purely coaxial part of the coaxial cell. Other parts have been modeled with other elements of AC theory. A new electrical model for the coaxial probe is proposed, based on LC resonances. Some Comsol FEM simulations have been performed on the coaxial cell, as well as on electric property sensors. Ideas to designs of electrical sensors are discussed. It is mainly the geometry which has been investigated. First it was proposed that a phenomenon of resonance occurs at the interface of the bottom and coaxial part of the cell, LC resonance. The resonance effect has later been investigated and identified as quarter wavelength resonance, due to the length of the measurement cell and change of wave velocity due to wave propagation in MUT. Simulations of proposed circuit equivalents in Orcad with PSpice have given some correlation with measured data for dry and non-conducting samples. There is still work to be done, to complete an accurate mathematical model of the system.

Validerat; 20110824 (anonymous)

Subjects/Keywords: Technology; Teknik; measurement; moisture; RF; electric permittivity; magnetic permeability; broad-band spectroscopy; frequency spectra; magnetite concentrate; Fe3O4; resistivity; equivalent circuits; coaxial cell; quarter wave resonance

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APA (6^th Edition):

Karlsson, C. A. M. (2011). Sensus Aquae in Ferrum ac Air : Karakterisering av elektriska egenskaper hos ett fuktmätnings system. (Thesis). Luleå University of Technology. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-54848

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):

Karlsson, Christian A M. “Sensus Aquae in Ferrum ac Air : Karakterisering av elektriska egenskaper hos ett fuktmätnings system.” 2011. Thesis, Luleå University of Technology. Accessed January 23, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-54848.

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

MLA Handbook (7^th Edition):

Karlsson, Christian A M. “Sensus Aquae in Ferrum ac Air : Karakterisering av elektriska egenskaper hos ett fuktmätnings system.” 2011. Web. 23 Jan 2021.

Vancouver:

Karlsson CAM. Sensus Aquae in Ferrum ac Air : Karakterisering av elektriska egenskaper hos ett fuktmätnings system. [Internet] [Thesis]. Luleå University of Technology; 2011. [cited 2021 Jan 23]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-54848.

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

Council of Science Editors:

Karlsson CAM. Sensus Aquae in Ferrum ac Air : Karakterisering av elektriska egenskaper hos ett fuktmätnings system. [Thesis]. Luleå University of Technology; 2011. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-54848

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

University of Florida

8. Cheng, Xiaoyu. Wireless Biomedical Telemetry Systems Based on Flexible Metamaterial Circuits and Advanced Rf Architectures.

Degree: PhD, Electrical and Computer Engineering, 2013, University of Florida

URL: https://ufdc.ufl.edu/UFE0045407

► Exploration of several novel wireless components and their applications in different bio-medical telemetry systems are presented.Individual RF components including low noise amplifier and several different… (more)

▼ Exploration of several novel wireless components and their applications in different bio-medical telemetry systems are presented.Individual RF components including low noise amplifier and several different types of flexible antennas based on liquid crystalline polymer (LCP) are proposed,designed, fabricated and characterized. All those components are then employed in two platforms including a novel wireless capsule endoscope and a wireless mouth guard. Due to the parasitics of the IC packaging,amplifiers always show gain roll off. The amplifier gain is higher at low frequency, but is lower at high frequency. A frequency equalizer is used to compensate the gain roll off. With the area of 6mm×8mm, a gain flatness of ±1.1dB is demonstrated from 100 MHz to 7 GHz with a nominal gain of 33.5dB. Antennas for implants including capsule endoscope applications are difficult to implement due to the dispersive and lossy nature of human body. With the assistance of the human body model from Ansys Inc., a family of new wrappable antennas based on flexible substrates are designed,fabricated and characterized. Those wrappable antennas are based on patches,and are wrapped into a cylindrical capsule shape. The antenna size is minimized by using inductive slot metamaterial particles and electrical vias loading.Those antennas show a good omni-directional pattern while offering electromagnetic interference (EMI) shielding and physical protection to the capsule endoscope systems. Bruxism involves the activity of grinding and clenching teeth for non-function purposes. While traditional wired systems constraint patients from moving freely, a new wireless mouth guard is developed based on a capacitance to digital signal converter. However, this system suffers from common mode noise generated by oral tissue moving. A time constant method with quasi-differential input is used on a new mouth guard system and common mode noise is suppressed using algorithms in the microprocessor. Metamaterials are a family of artificial structures which demonstrate behaviors that are not readily available in the nature. They are good candidates for sensing due to their tunability. Based on this feature, a battery free and wireless mouth guard for Bruxism is also developed and demonstrated. ( en ) Advisors/Committee Members: YOON,YONG KYU (committee chair), LIN,JENSHAN (committee member), WONG,FONG (committee member), KIM,GLORIA JUNG A (committee member).

Subjects/Keywords: Amplifiers; Antenna design; Antennas; Bruxism; Electric potential; Endoscopes; Patch antennas; Permittivity; Sensors; Transmission lines; amplifiers – antennas – biomedical – bluetooth – bruxism – endoscope – metamaterial – mhealth – patch

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APA (6^th Edition):

Cheng, X. (2013). Wireless Biomedical Telemetry Systems Based on Flexible Metamaterial Circuits and Advanced Rf Architectures. (Doctoral Dissertation). University of Florida. Retrieved from https://ufdc.ufl.edu/UFE0045407

Chicago Manual of Style (16^th Edition):

Cheng, Xiaoyu. “Wireless Biomedical Telemetry Systems Based on Flexible Metamaterial Circuits and Advanced Rf Architectures.” 2013. Doctoral Dissertation, University of Florida. Accessed January 23, 2021. https://ufdc.ufl.edu/UFE0045407.

MLA Handbook (7^th Edition):

Cheng, Xiaoyu. “Wireless Biomedical Telemetry Systems Based on Flexible Metamaterial Circuits and Advanced Rf Architectures.” 2013. Web. 23 Jan 2021.

Vancouver:

Cheng X. Wireless Biomedical Telemetry Systems Based on Flexible Metamaterial Circuits and Advanced Rf Architectures. [Internet] [Doctoral dissertation]. University of Florida; 2013. [cited 2021 Jan 23]. Available from: https://ufdc.ufl.edu/UFE0045407.

Council of Science Editors:

Cheng X. Wireless Biomedical Telemetry Systems Based on Flexible Metamaterial Circuits and Advanced Rf Architectures. [Doctoral Dissertation]. University of Florida; 2013. Available from: https://ufdc.ufl.edu/UFE0045407

University of Florida

9. Venigalla, Sridhar, 1964-. Analysis and performance of electrochemically synthesized barium titanate films and electrolytic capacitors.

Degree: PhD, Materials Science and Engineering, 1995, University of Florida

URL: https://ufdc.ufl.edu/AA00002054

Subjects/Keywords: Anodes; Barium; Capacitance; Capacitors; Dielectric materials; Electric potential; Electrolytes; Ions; Permittivity; Thin films

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APA (6^th Edition):

Venigalla, Sridhar, 1. (1995). Analysis and performance of electrochemically synthesized barium titanate films and electrolytic capacitors. (Doctoral Dissertation). University of Florida. Retrieved from https://ufdc.ufl.edu/AA00002054

Chicago Manual of Style (16^th Edition):

Venigalla, Sridhar, 1964-. “Analysis and performance of electrochemically synthesized barium titanate films and electrolytic capacitors.” 1995. Doctoral Dissertation, University of Florida. Accessed January 23, 2021. https://ufdc.ufl.edu/AA00002054.

MLA Handbook (7^th Edition):

Venigalla, Sridhar, 1964-. “Analysis and performance of electrochemically synthesized barium titanate films and electrolytic capacitors.” 1995. Web. 23 Jan 2021.

Vancouver:

Venigalla, Sridhar 1. Analysis and performance of electrochemically synthesized barium titanate films and electrolytic capacitors. [Internet] [Doctoral dissertation]. University of Florida; 1995. [cited 2021 Jan 23]. Available from: https://ufdc.ufl.edu/AA00002054.

Council of Science Editors:

Venigalla, Sridhar 1. Analysis and performance of electrochemically synthesized barium titanate films and electrolytic capacitors. [Doctoral Dissertation]. University of Florida; 1995. Available from: https://ufdc.ufl.edu/AA00002054

University of Florida

10. Tang, Haixiong. Investigation of Structure-Property Relations in Nanocomposites for Energy Storage.

Degree: PhD, Materials Science and Engineering, 2013, University of Florida

URL: https://ufdc.ufl.edu/UFE0045233

► High energy density capacitors arecritically important in advanced electronic devices and electric power systemsthat rely on pulsed-power, such as defibrillators, and high powermicrowaves. Nanocomposites have… (more)

▼ High energy density capacitors arecritically important in advanced electronic devices and electric power systemsthat rely on pulsed-power, such as defibrillators, and high powermicrowaves. Nanocomposites have greatpotential as high energy capacitors, since they combine the high breakdownstrength of polymers with the high dielectric permittivity of ceramics, to produce energy density greater than either in its pure form. Most of the currentresearch has focused on improving the energy denisty of nanocomposites by choosinga high dielectric permittivity filler and high breakdown strength matrix. However, the improvement of dielectricpermittivity comes at the expense of the breakdown strength thus limiting theultimate performance of the capacitors. This dissertation hasinvestigated the relationship between filler’s structure (aspectratio and orientation) and energy storage performance of nanocomposites. Initially, the effect of the filler’s aspect ratio on the nanocomposite’s energy density was studied. It isdemonstrated that the nanocomposites with PZT nanowires(NWs) show 77.8% increasein energy density compared to samples with PZT nanorods at 50 % volume fraction. Second, this work investigates the role of NWorientation towards the improvement in the energy density of nanocomposites. It is demonstrated that the energy storagecapacity of the nanocomposite can be enhanced by 51.6% through the alignment of PZT nanowires in the direction ofthe applied electric field as compared to the sample with randomly alignednanowires at 20% volume fraction. Furtherresearch is performed to quantify the dielectric constant of nanocomposites asa function of both aspect ratio and orientation factorof the fillers. Based on these findings, two different types of nanocomposites withhigh energy density are fabricated. Thenanocomposites with 7.5 vol.% Ba0.2Sr0.8TiO3NWs in PVDF are shown to have an ultra-high energy density of 14.86 J/cc at 450 MV/mwith microsecond discharge time speed, which exceeds those reported in theliterature for ceramic/polymer composites, and is 1138% greater than the reported commercialcapacitor biaxial oriented polypropylene (1.2 J/cc at 640 MV/m). This dissertation will serve to disseminate a state-of-the-artmethod of preparing nanocomposites with high energy density and fast dischargefor development of future pulsed-power capacitors. ( en ) Advisors/Committee Members: Sodano, Henry (committee chair), Jones, Jacob L (committee member), Andrew, Jennifer (committee member), Sigmund, Wolfgang Michael (committee member), Taylor, Curtis (committee member).

Subjects/Keywords: Aspect ratio; Capacitors; Dielectric materials; Dielectric polarization; Electric fields; Flux density; Material concentration; Nanocomposites; Permittivity; Polymers; capacitor – energy – film – nanocomposite – nanowire – pvdf

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APA (6^th Edition):

Tang, H. (2013). Investigation of Structure-Property Relations in Nanocomposites for Energy Storage. (Doctoral Dissertation). University of Florida. Retrieved from https://ufdc.ufl.edu/UFE0045233

Chicago Manual of Style (16^th Edition):

Tang, Haixiong. “Investigation of Structure-Property Relations in Nanocomposites for Energy Storage.” 2013. Doctoral Dissertation, University of Florida. Accessed January 23, 2021. https://ufdc.ufl.edu/UFE0045233.

MLA Handbook (7^th Edition):

Tang, Haixiong. “Investigation of Structure-Property Relations in Nanocomposites for Energy Storage.” 2013. Web. 23 Jan 2021.

Vancouver:

Tang H. Investigation of Structure-Property Relations in Nanocomposites for Energy Storage. [Internet] [Doctoral dissertation]. University of Florida; 2013. [cited 2021 Jan 23]. Available from: https://ufdc.ufl.edu/UFE0045233.

Council of Science Editors:

Tang H. Investigation of Structure-Property Relations in Nanocomposites for Energy Storage. [Doctoral Dissertation]. University of Florida; 2013. Available from: https://ufdc.ufl.edu/UFE0045233

University of Florida

11. Thatcher, Evan M. Resonant Frequencies and Optical Properties of Solids.

Degree: PhD, Physics, 2015, University of Florida

URL: https://ufdc.ufl.edu/UFE0049301

► Resonant frequencies and their impact on the optical properties materials are investigated. It is shown that the optical response of solids to photo-stimulus can be… (more)

Subjects/Keywords: Charge carriers; Conceptual lattices; Damping; Electric fields; Electrons; Fourier transformations; Oscillators; Permittivity; Phonons; Reflectance; coupled – dichalcogenide – infrared – phonon – plasmon – pyrochlore – spectroscopy – ultrafast

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APA (6^th Edition):

Thatcher, E. M. (2015). Resonant Frequencies and Optical Properties of Solids. (Doctoral Dissertation). University of Florida. Retrieved from https://ufdc.ufl.edu/UFE0049301

Chicago Manual of Style (16^th Edition):

Thatcher, Evan M. “Resonant Frequencies and Optical Properties of Solids.” 2015. Doctoral Dissertation, University of Florida. Accessed January 23, 2021. https://ufdc.ufl.edu/UFE0049301.

MLA Handbook (7^th Edition):

Thatcher, Evan M. “Resonant Frequencies and Optical Properties of Solids.” 2015. Web. 23 Jan 2021.

Vancouver:

Thatcher EM. Resonant Frequencies and Optical Properties of Solids. [Internet] [Doctoral dissertation]. University of Florida; 2015. [cited 2021 Jan 23]. Available from: https://ufdc.ufl.edu/UFE0049301.

Council of Science Editors:

Thatcher EM. Resonant Frequencies and Optical Properties of Solids. [Doctoral Dissertation]. University of Florida; 2015. Available from: https://ufdc.ufl.edu/UFE0049301

University of Florida

12. Prewitt, Anderson Dunbar. Effects of the Poling Process on Dielectric, Piezoelectric, and Ferroelectric Properties of Lead Zirconate Titanate.

Degree: PhD, Materials Science and Engineering, 2012, University of Florida

URL: https://ufdc.ufl.edu/UFE0043951

► Smart materials are widely used in many of today's relevant technologies such as nano and micro electromechanical systems (NEMS and MEMS), sensors, actuators, nonvolatile memory,… (more)

Subjects/Keywords: Ceramic materials; Coercivity; Dielectric materials; Domain walls; Electric fields; Ferroelectric materials; Hysteresis; Mechanical stress; Permittivity; Wave diffraction; dielectric – domain – domain-wall – ferroelectric – piezoelectric – poling

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APA (6^th Edition):

Prewitt, A. D. (2012). Effects of the Poling Process on Dielectric, Piezoelectric, and Ferroelectric Properties of Lead Zirconate Titanate. (Doctoral Dissertation). University of Florida. Retrieved from https://ufdc.ufl.edu/UFE0043951

Chicago Manual of Style (16^th Edition):

Prewitt, Anderson Dunbar. “Effects of the Poling Process on Dielectric, Piezoelectric, and Ferroelectric Properties of Lead Zirconate Titanate.” 2012. Doctoral Dissertation, University of Florida. Accessed January 23, 2021. https://ufdc.ufl.edu/UFE0043951.

MLA Handbook (7^th Edition):

Prewitt, Anderson Dunbar. “Effects of the Poling Process on Dielectric, Piezoelectric, and Ferroelectric Properties of Lead Zirconate Titanate.” 2012. Web. 23 Jan 2021.

Vancouver:

Prewitt AD. Effects of the Poling Process on Dielectric, Piezoelectric, and Ferroelectric Properties of Lead Zirconate Titanate. [Internet] [Doctoral dissertation]. University of Florida; 2012. [cited 2021 Jan 23]. Available from: https://ufdc.ufl.edu/UFE0043951.

Council of Science Editors:

Prewitt AD. Effects of the Poling Process on Dielectric, Piezoelectric, and Ferroelectric Properties of Lead Zirconate Titanate. [Doctoral Dissertation]. University of Florida; 2012. Available from: https://ufdc.ufl.edu/UFE0043951

University of Florida

13. JONES, MICHAEL N. ( Author, Primary ). Leakage Current Behavior of Reactive RF Sputtered HfO2 Thin Films.

Degree: University of Florida

URL: https://ufdc.ufl.edu/UFE0001740

Subjects/Keywords: Annealing; Crystallinity; Dielectric materials; Electric current; Electrons; Oxides; Oxygen; Permittivity; Room temperature; Silicon

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

APA (6^th Edition):

JONES, MICHAEL N. ( Author, P. ). (n.d.). Leakage Current Behavior of Reactive RF Sputtered HfO2 Thin Films. (Thesis). University of Florida. Retrieved from https://ufdc.ufl.edu/UFE0001740

Note: this citation may be lacking information needed for this citation format:
No year of publication.
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

JONES, MICHAEL N. ( Author, Primary ). “Leakage Current Behavior of Reactive RF Sputtered HfO2 Thin Films.” Thesis, University of Florida. Accessed January 23, 2021. https://ufdc.ufl.edu/UFE0001740.

Note: this citation may be lacking information needed for this citation format:
No year of publication.
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

JONES, MICHAEL N. ( Author, Primary ). “Leakage Current Behavior of Reactive RF Sputtered HfO2 Thin Films.” Web. 23 Jan 2021.

Note: this citation may be lacking information needed for this citation format:
No year of publication.

Vancouver:

JONES, MICHAEL N. ( Author P). Leakage Current Behavior of Reactive RF Sputtered HfO2 Thin Films. [Internet] [Thesis]. University of Florida; [cited 2021 Jan 23]. Available from: https://ufdc.ufl.edu/UFE0001740.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
No year of publication.

Council of Science Editors:

JONES, MICHAEL N. ( Author P). Leakage Current Behavior of Reactive RF Sputtered HfO2 Thin Films. [Thesis]. University of Florida; Available from: https://ufdc.ufl.edu/UFE0001740

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
No year of publication.

University of Florida

14. Aksel, Elena. Structure and Properties of Sodium Bismuth Titanate Ferroelectric Ceramics.

Degree: PhD, Materials Science and Engineering, 2012, University of Florida

URL: https://ufdc.ufl.edu/UFE0043928

► Piezoelectric materials are commonly used in sensor and actuator technologies due to their unique ability to couple electrical and mechanical displacements. Applications of piezoelectric materials… (more)

Subjects/Keywords: Ceramic materials; Depolarization; Diffraction patterns; Electric fields; Lattice parameters; Neutrons; Permittivity; Perovskites; Room temperature; Solar X rays; diffraction – ferroelectric – lead-free – piezoelectric

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

APA (6^th Edition):

Aksel, E. (2012). Structure and Properties of Sodium Bismuth Titanate Ferroelectric Ceramics. (Doctoral Dissertation). University of Florida. Retrieved from https://ufdc.ufl.edu/UFE0043928

Chicago Manual of Style (16^th Edition):

Aksel, Elena. “Structure and Properties of Sodium Bismuth Titanate Ferroelectric Ceramics.” 2012. Doctoral Dissertation, University of Florida. Accessed January 23, 2021. https://ufdc.ufl.edu/UFE0043928.

MLA Handbook (7^th Edition):

Aksel, Elena. “Structure and Properties of Sodium Bismuth Titanate Ferroelectric Ceramics.” 2012. Web. 23 Jan 2021.

Vancouver:

Aksel E. Structure and Properties of Sodium Bismuth Titanate Ferroelectric Ceramics. [Internet] [Doctoral dissertation]. University of Florida; 2012. [cited 2021 Jan 23]. Available from: https://ufdc.ufl.edu/UFE0043928.

Council of Science Editors:

Aksel E. Structure and Properties of Sodium Bismuth Titanate Ferroelectric Ceramics. [Doctoral Dissertation]. University of Florida; 2012. Available from: https://ufdc.ufl.edu/UFE0043928

University of Dayton

15. Algadey, Tarig. Investigation of Negative Refractive Index in Isotropic Chiral Metamaterials Under First and Second-Order Material Dispersion With and Without Conductive Loss.

Degree: PhD, Electrical Engineering, 2016, University of Dayton

URL: http://rave.ohiolink.edu/etdc/view?acc_num=dayton1460819619

► In recent years, considerable research has been carried out relative to the electromagnetic (EM) propagation and refraction characteristics in metamaterials with emphasis on the origins… (more)

▼ In recent years, considerable research has been carried out relative to the electromagnetic (EM) propagation and refraction characteristics in metamaterials with emphasis on the origins of negative refractive index. Negative refractive index may be introduced in metamaterials via different methods; one such is the condition whereby the Poynting vector of the EM wave is in opposition to the group velocity in the material. Alternatively, negative refractive index also occurs when the group and phase velocities in the medium are in opposition. The latter phenomenon has been investigated extensively in the literature, including recent work involving chiral metamaterials with material dispersion up to the first order. This dissertation examines the possible emergence of negative refractive index in dispersive chiral (lossless and lossy) metamaterials with material dispersion up to the first and second order. The motivation of this work has two parts- the first part is to determine if using second- as opposed to first-order material dispersion may lead to more practically realizable negative index behavior in the lossless material; the second part is to determine if including the conductive loss to the medium with material dispersion up to the first order (a feature likely to be present in most realistic cases; conductive losses in such materials as nanometals, or dielectric losses in a variety of other nanomaterials, such as lithium niobate and Sic+Ag) may lead to the emergence of negative index. This dissertation investigates the above problems (with the exception of lossy dielectrics, the determination of which is currently ongoing) by using spectral and phasor plane-wave based analytical approaches as well as alternative analysis incorporating practical physical models into the electromagnetic equations.In this work, a spectral approach combined with slowly time-varying phasor analysis is applied leading to the derivation of EM phase and group velocities analytically, and the resulting phase and group velocities and the corresponding phase and group indices are evaluated by selecting somewhat arbitrary dispersive parameters. The results indicate the emergence of negative index (via negative phase indices along with positive group indices, as reported in the literature) or NIM behavior over information bandwidths in the low RF range. The second-order results are not significantly better than those for first-order based on the theoretical analysis; however, greater parametric flexibility exists for the secondorder system leading to higher likelihood of achieving NIM over practical frequency bands. The velocities and indices computed using the Lorentzian and Condon models. More importantly, NIM is found not to occur in first-order when using practical models. Also we have revisited the first order calculations and it is seen that (In the lossless -first order calculations) to match up with all negative index conditions or requirements, the relative electric permittivity and relative magnetic permeability must be negative… Advisors/Committee Members: Chatterjee, Monish (Advisor).

Subjects/Keywords: Electrical Engineering; Electromagnetics; Physics; Negative index; phase velocity; phase index; group velocity; group index; negative relative electric permittivity; negative relative magnetic permeability; polarization state; right circular polarization; lossy chiral material

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

APA (6^th Edition):

Algadey, T. (2016). Investigation of Negative Refractive Index in Isotropic Chiral Metamaterials Under First and Second-Order Material Dispersion With and Without Conductive Loss. (Doctoral Dissertation). University of Dayton. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=dayton1460819619

Chicago Manual of Style (16^th Edition):

Algadey, Tarig. “Investigation of Negative Refractive Index in Isotropic Chiral Metamaterials Under First and Second-Order Material Dispersion With and Without Conductive Loss.” 2016. Doctoral Dissertation, University of Dayton. Accessed January 23, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1460819619.

MLA Handbook (7^th Edition):

Algadey, Tarig. “Investigation of Negative Refractive Index in Isotropic Chiral Metamaterials Under First and Second-Order Material Dispersion With and Without Conductive Loss.” 2016. Web. 23 Jan 2021.

Vancouver:

Algadey T. Investigation of Negative Refractive Index in Isotropic Chiral Metamaterials Under First and Second-Order Material Dispersion With and Without Conductive Loss. [Internet] [Doctoral dissertation]. University of Dayton; 2016. [cited 2021 Jan 23]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=dayton1460819619.

Council of Science Editors:

Algadey T. Investigation of Negative Refractive Index in Isotropic Chiral Metamaterials Under First and Second-Order Material Dispersion With and Without Conductive Loss. [Doctoral Dissertation]. University of Dayton; 2016. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=dayton1460819619

Universidade do Rio Grande do Norte

16. Cavalcante, Gustavo Araújo. Desenvolvimento de circuitos planares sobre substratos têxteis .

Degree: 2014, Universidade do Rio Grande do Norte

URL: http://repositorio.ufrn.br/handle/123456789/15245

► The use of flexible materials for the development of planar circuits is one of the most desired and studied characteristics, lately, by researchers. This happens… (more)

Subjects/Keywords: Substratos têxteis. Permissividade elétrica. Tangente de perdas. Antenas compactas. Antenas flexíveis. Superfícies seletivas de frequência. FSS. Filtros flexíveis. Método das ondas. WCIP; Textile substrates. Electric permittivity. Loss tangent. Compact antennas. Flexible antennas. Frequency selective surfaces. FSS. flexible filters. Method of waves. WCIP

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APA (6^th Edition):

Cavalcante, G. A. (2014). Desenvolvimento de circuitos planares sobre substratos têxteis . (Doctoral Dissertation). Universidade do Rio Grande do Norte. Retrieved from http://repositorio.ufrn.br/handle/123456789/15245

Chicago Manual of Style (16^th Edition):

Cavalcante, Gustavo Araújo. “Desenvolvimento de circuitos planares sobre substratos têxteis .” 2014. Doctoral Dissertation, Universidade do Rio Grande do Norte. Accessed January 23, 2021. http://repositorio.ufrn.br/handle/123456789/15245.

MLA Handbook (7^th Edition):

Cavalcante, Gustavo Araújo. “Desenvolvimento de circuitos planares sobre substratos têxteis .” 2014. Web. 23 Jan 2021.

Vancouver:

Cavalcante GA. Desenvolvimento de circuitos planares sobre substratos têxteis . [Internet] [Doctoral dissertation]. Universidade do Rio Grande do Norte; 2014. [cited 2021 Jan 23]. Available from: http://repositorio.ufrn.br/handle/123456789/15245.

Council of Science Editors:

Cavalcante GA. Desenvolvimento de circuitos planares sobre substratos têxteis . [Doctoral Dissertation]. Universidade do Rio Grande do Norte; 2014. Available from: http://repositorio.ufrn.br/handle/123456789/15245

Universidade do Rio Grande do Norte

17. Cavalcante, Gustavo Araújo. Desenvolvimento de circuitos planares sobre substratos têxteis .

Degree: 2014, Universidade do Rio Grande do Norte

URL: http://repositorio.ufrn.br/handle/123456789/15245

► The use of flexible materials for the development of planar circuits is one of the most desired and studied characteristics, lately, by researchers. This happens… (more)

Subjects/Keywords: Substratos têxteis. Permissividade elétrica. Tangente de perdas. Antenas compactas. Antenas flexíveis. Superfícies seletivas de frequência. FSS. Filtros flexíveis. Método das ondas. WCIP; Textile substrates. Electric permittivity. Loss tangent. Compact antennas. Flexible antennas. Frequency selective surfaces. FSS. flexible filters. Method of waves. WCIP

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

APA (6^th Edition):

Cavalcante, G. A. (2014). Desenvolvimento de circuitos planares sobre substratos têxteis . (Thesis). Universidade do Rio Grande do Norte. Retrieved from http://repositorio.ufrn.br/handle/123456789/15245

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):

Cavalcante, Gustavo Araújo. “Desenvolvimento de circuitos planares sobre substratos têxteis .” 2014. Thesis, Universidade do Rio Grande do Norte. Accessed January 23, 2021. http://repositorio.ufrn.br/handle/123456789/15245.

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

MLA Handbook (7^th Edition):

Cavalcante, Gustavo Araújo. “Desenvolvimento de circuitos planares sobre substratos têxteis .” 2014. Web. 23 Jan 2021.

Vancouver:

Cavalcante GA. Desenvolvimento de circuitos planares sobre substratos têxteis . [Internet] [Thesis]. Universidade do Rio Grande do Norte; 2014. [cited 2021 Jan 23]. Available from: http://repositorio.ufrn.br/handle/123456789/15245.

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

Council of Science Editors:

Cavalcante GA. Desenvolvimento de circuitos planares sobre substratos têxteis . [Thesis]. Universidade do Rio Grande do Norte; 2014. Available from: http://repositorio.ufrn.br/handle/123456789/15245

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

18. Samet, Mariem. Étude théorique et expérimentale des effets de la polarisation interfaciale dans les spectres diélectrique des matériaux composites multiphasiques : Theoretical and experimantal analysis of interfacial polarisation effects in dielectric spectra of multiphases materials.

Degree: Docteur es, Sciences Physiques, 2015, Université Claude Bernard – Lyon I

URL: http://www.theses.fr/2015LYO10134

►

Ce travail de thèse se situe dans le concept général de contrôler, améliorer et optimiser la performance électrique des matériaux composites par l'analyse systématique de… (more)

▼

Ce travail de thèse se situe dans le concept général de contrôler, améliorer et optimiser la performance électrique des matériaux composites par l'analyse systématique de la réponse diélectrique globale des matériaux composites pour différentes morphologies. Pour mener à des informations complètes, une corrélation entre trois approches indépendants a été réalisée: des simulations numériques, des calculs analytiques et des mesures diélectriques (spectromètre diélectrique de type Novo-contrôle). D'abord on a établie des lois d'échelles et la contribution originale de cette thèse est de réussir à mettre des lois d'échelle universelle pour la réponse diélectrique globales des matériaux composites qui sont censés de servir à la base pour les actuelles et futures études sur les propriétés électriques et diélectriques des matériaux composites. Comme application, ces lois d'échelles que nous avons dérivées nous ont permis de développer des applications, tel que la conception des matériaux multicouches à haute permittivité et faible pertes diélectriques au service des applications dans des domaines de stockage d'énergie, en ajustant les valeurs de conductivité et les fractions de volume des phases constituantes. Cet approche a été menée sur des composites en structure bicouches constitués d'une superposition de couches de polymères ayant des conductivités différentes. Et en plus, ces lois d'échelles ont été à la base pour la découverte pour la première fois, d'un critère de discrimination entre deux types différent de polarisation électriques: la polarisation interfaciale de type MWS et la polarisation d'électrode. Aussi, on a dérivé une nouvelle formule qui est valable à la fois pour la polarisation d'électrode et les effets de la polarisation interfaciale. Elle permet non seulement d'estimer l'épaisseur des couches interfaciales formées à l'électrode en raison des effets de polarisation mais aussi à développer une nouvelle méthode de mesure de la conductivité des matériaux sans contact direct qui a servi pour des mesures couplées diélectrique – mécanique

This research is significant in that it not only develops a generalized approach for modeling the electrical properties of multiphase composite materials but also introduces novel experimental applications in the domain of dielectric properties of composite materials. In order to get complete information: numerical simulations, analytical calculations and dielectric measurements by means of Broadband Dielectric Spectroscopy (BDS) were carried out in this study. First, we derived the scaling laws through a systematically study of global dielectric response of composite materials with different morphology and the original contribution of this thesis is to succeed to derive a universal scaling laws for the global dielectric response of composite materials. Based on these scaling laws three achievements are taken place: designing layered polymer materials with high values of permittivity and low dielectric losses, by adjusting the values of conductivity and the volume…

Advisors/Committee Members: Boiteux, Gisèle (thesis director), Anatoli, Serghei (thesis director), Kallel, Ali (thesis director).

Subjects/Keywords: Matériaux composites multiphasique; Propriétés électriques et diélectriques; Fréquences caractéristiques; Lois d'échelles; Polarisation interfaciale; Polarisation d'électrode; Permittivité élevée; Spectres diélectriques; Multiphase composite materials; Electric and dielectric properties; Characteristic frequencies; Scaling laws; Interfacial polarization; Electrode polarization; High permittivity; Dielectric spectra; 620.11

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

APA (6^th Edition):

Samet, M. (2015). Étude théorique et expérimentale des effets de la polarisation interfaciale dans les spectres diélectrique des matériaux composites multiphasiques : Theoretical and experimantal analysis of interfacial polarisation effects in dielectric spectra of multiphases materials. (Doctoral Dissertation). Université Claude Bernard – Lyon I. Retrieved from http://www.theses.fr/2015LYO10134

Chicago Manual of Style (16^th Edition):

Samet, Mariem. “Étude théorique et expérimentale des effets de la polarisation interfaciale dans les spectres diélectrique des matériaux composites multiphasiques : Theoretical and experimantal analysis of interfacial polarisation effects in dielectric spectra of multiphases materials.” 2015. Doctoral Dissertation, Université Claude Bernard – Lyon I. Accessed January 23, 2021. http://www.theses.fr/2015LYO10134.

MLA Handbook (7^th Edition):

Samet, Mariem. “Étude théorique et expérimentale des effets de la polarisation interfaciale dans les spectres diélectrique des matériaux composites multiphasiques : Theoretical and experimantal analysis of interfacial polarisation effects in dielectric spectra of multiphases materials.” 2015. Web. 23 Jan 2021.

Vancouver:

Samet M. Étude théorique et expérimentale des effets de la polarisation interfaciale dans les spectres diélectrique des matériaux composites multiphasiques : Theoretical and experimantal analysis of interfacial polarisation effects in dielectric spectra of multiphases materials. [Internet] [Doctoral dissertation]. Université Claude Bernard – Lyon I; 2015. [cited 2021 Jan 23]. Available from: http://www.theses.fr/2015LYO10134.

Council of Science Editors:

Samet M. Étude théorique et expérimentale des effets de la polarisation interfaciale dans les spectres diélectrique des matériaux composites multiphasiques : Theoretical and experimantal analysis of interfacial polarisation effects in dielectric spectra of multiphases materials. [Doctoral Dissertation]. Université Claude Bernard – Lyon I; 2015. Available from: http://www.theses.fr/2015LYO10134

Iowa State University

19. Zhao, Xiaohui. Development of long range cation order and its impact on dielectric properties in Pb(Mg1/3Nb2/3)O3 based relaxor ferroelectrics.

Degree: 2008, Iowa State University

URL: https://lib.dr.iastate.edu/etd/10903

► As the prototype of relaxor ferroelectrics, Pb(Mg1/3Nb2/3)O3 (PMN) has been extensively investigated for several decades. There are two types of microscopic features in PMN: cation… (more)

Subjects/Keywords: cation order; dielectric permittivity; electric field-induced phase transition; ferroelectric ceramic; lead magnesium niobate; relaxor ferroelectric; Materials Science and Engineering

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APA (6^th Edition):

Zhao, X. (2008). Development of long range cation order and its impact on dielectric properties in Pb(Mg1/3Nb2/3)O3 based relaxor ferroelectrics. (Thesis). Iowa State University. Retrieved from https://lib.dr.iastate.edu/etd/10903

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):

Zhao, Xiaohui. “Development of long range cation order and its impact on dielectric properties in Pb(Mg1/3Nb2/3)O3 based relaxor ferroelectrics.” 2008. Thesis, Iowa State University. Accessed January 23, 2021. https://lib.dr.iastate.edu/etd/10903.

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

MLA Handbook (7^th Edition):

Zhao, Xiaohui. “Development of long range cation order and its impact on dielectric properties in Pb(Mg1/3Nb2/3)O3 based relaxor ferroelectrics.” 2008. Web. 23 Jan 2021.

Vancouver:

Zhao X. Development of long range cation order and its impact on dielectric properties in Pb(Mg1/3Nb2/3)O3 based relaxor ferroelectrics. [Internet] [Thesis]. Iowa State University; 2008. [cited 2021 Jan 23]. Available from: https://lib.dr.iastate.edu/etd/10903.

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

Council of Science Editors:

Zhao X. Development of long range cation order and its impact on dielectric properties in Pb(Mg1/3Nb2/3)O3 based relaxor ferroelectrics. [Thesis]. Iowa State University; 2008. Available from: https://lib.dr.iastate.edu/etd/10903

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

University of Florida

20. Fathi, Zakaryae, 1966-. Surface modification of sodium aluminosilicate glasses using microwave energy.

Degree: 1994, University of Florida

URL: https://ufdc.ufl.edu/AA00039876

Subjects/Keywords: Alkalies; Dielectric materials; Dielectric polarization; Electric fields; Heating; Ions; Microwaves; Oxygen; Permittivity; Sodium; Materials Science and Engineering thesis Ph.D

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APA (6^th Edition):

Fathi, Zakaryae, 1. (1994). Surface modification of sodium aluminosilicate glasses using microwave energy. (Thesis). University of Florida. Retrieved from https://ufdc.ufl.edu/AA00039876

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):

Fathi, Zakaryae, 1966-. “Surface modification of sodium aluminosilicate glasses using microwave energy.” 1994. Thesis, University of Florida. Accessed January 23, 2021. https://ufdc.ufl.edu/AA00039876.

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

MLA Handbook (7^th Edition):

Fathi, Zakaryae, 1966-. “Surface modification of sodium aluminosilicate glasses using microwave energy.” 1994. Web. 23 Jan 2021.

Vancouver:

Fathi, Zakaryae 1. Surface modification of sodium aluminosilicate glasses using microwave energy. [Internet] [Thesis]. University of Florida; 1994. [cited 2021 Jan 23]. Available from: https://ufdc.ufl.edu/AA00039876.

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

Council of Science Editors:

Fathi, Zakaryae 1. Surface modification of sodium aluminosilicate glasses using microwave energy. [Thesis]. University of Florida; 1994. Available from: https://ufdc.ufl.edu/AA00039876

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

University of Florida

21. JONNALAGADDA, SREERAM. Resistivity and Time Domain Reflectometry Sensors for Assessing in situ Moisture Content in a Bioreactor Landfill.

Degree: University of Florida

URL: https://ufdc.ufl.edu/UFE0003501

Subjects/Keywords: Bioreactors; Calibration; Conductivity; Electric potential; Electrical resistivity; Landfills; Moisture content; Neutrons; Permittivity; Sensors; Greater Orlando ( local )

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APA (6^th Edition):

JONNALAGADDA, S. (n.d.). Resistivity and Time Domain Reflectometry Sensors for Assessing in situ Moisture Content in a Bioreactor Landfill. (Thesis). University of Florida. Retrieved from https://ufdc.ufl.edu/UFE0003501

Note: this citation may be lacking information needed for this citation format:
No year of publication.
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

JONNALAGADDA, SREERAM. “Resistivity and Time Domain Reflectometry Sensors for Assessing in situ Moisture Content in a Bioreactor Landfill.” Thesis, University of Florida. Accessed January 23, 2021. https://ufdc.ufl.edu/UFE0003501.

Note: this citation may be lacking information needed for this citation format:
No year of publication.
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

JONNALAGADDA, SREERAM. “Resistivity and Time Domain Reflectometry Sensors for Assessing in situ Moisture Content in a Bioreactor Landfill.” Web. 23 Jan 2021.

Note: this citation may be lacking information needed for this citation format:
No year of publication.

Vancouver:

JONNALAGADDA S. Resistivity and Time Domain Reflectometry Sensors for Assessing in situ Moisture Content in a Bioreactor Landfill. [Internet] [Thesis]. University of Florida; [cited 2021 Jan 23]. Available from: https://ufdc.ufl.edu/UFE0003501.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
No year of publication.

Council of Science Editors:

JONNALAGADDA S. Resistivity and Time Domain Reflectometry Sensors for Assessing in situ Moisture Content in a Bioreactor Landfill. [Thesis]. University of Florida; Available from: https://ufdc.ufl.edu/UFE0003501

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
No year of publication.

University of Florida

22. Son, Seung-Young. Nitrogen Incorporated Hafnia Gate Dielectric Thin Film and Titanium Based Metal Gate Electrode for Dual Gate Application.

Degree: PhD, Materials Science and Engineering, 2008, University of Florida

URL: https://ufdc.ufl.edu/UFE0022442

► We evaluated the effect of nitridation temperature on interface layer (IL) quality of Hf-silicate gate dielectric has been reported. An increase in IL density and… (more)

▼ We evaluated the effect of nitridation temperature on interface layer (IL) quality of Hf-silicate gate dielectric has been reported. An increase in IL density and IL roughness was observed as the nitridation temperature was increased. Preferential interface reaction at dielectric-Si interface at higher temperatures was analyzed. The progressive increase in IL roughness finally led to degradation of breakdown voltage, shift in flat band voltage (0.54V) and deterioration of electron channel mobility by 20 % in samples nitrided at 1123 K. To reduce the interface degradation of thermal nitridation process, a low temperature process (623 K) for nitrogen incorporation in hafnia gate dielectric has been proposed. This method is based on post-deposition nitridation under ultraviolet light illuminated NH3 ambience. Uniformity of nitrogen distribution in the film was measured. Moreover, the amount of nitrogen incorporated by this process was comparable to that of high temperature thermal nitridation, maintaining low interface roughness (0.3 nm). An evaluation of Ti based gate metals has been reported. The effective metal work function were 4.27, 4.56 and 5.08 eV for Ti, TiN and TiB2, respectively. Regardless of gate electrodes, the conduction mechanism of the samples fitted with Poole-Frenkel model which is related to oxygen vacancies in the film. Ti gate electrode was found to be more favorable for NMOS device and TiB2 gate electrode can be used for PMOS. Further research for thermal stability of TiB2 gate electrodes was conducted. The extracted effective metal work function for TiB2 gate was about 5.08 eV. The work function showed almost identical values and sharp interface between metal and dielectric was confirmed after post deposition annealing by 1273 K. The work function lowering (4.91 eV) at 1373 K was caused by metal-dielectric intermixing and oxygen vacancy formation. TiB2 gate electrode was found to be suitable for use in PMOS device. Finally, Uniaxial?mechanical?strain altered gate leakage current and dielectric constant of MOS device are measured. Uniaxial stress is applied using four?point wafer bending along one one zero plane direction. The gate leakage current and dielectric constant are found to increase by up to 2 % under tensile and compressive stress direction. ( en ) Advisors/Committee Members: Singh, Rajiv K. (committee chair), Norton, David P. (committee member), Pearton, Stephen J. (committee member), Gila, Brent P. (committee member), Ren, Fan (committee member).

Subjects/Keywords: Annealing; Dielectric materials; Electric potential; Electrodes; Electrons; Nitrogen; Oxidation; Oxides; Oxygen; Permittivity; dielectric, hafniumoxide, metalgate, mos, thermalstability, uniaxialstess, workfunction

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APA (6^th Edition):

Son, S. (2008). Nitrogen Incorporated Hafnia Gate Dielectric Thin Film and Titanium Based Metal Gate Electrode for Dual Gate Application. (Doctoral Dissertation). University of Florida. Retrieved from https://ufdc.ufl.edu/UFE0022442

Chicago Manual of Style (16^th Edition):

Son, Seung-Young. “Nitrogen Incorporated Hafnia Gate Dielectric Thin Film and Titanium Based Metal Gate Electrode for Dual Gate Application.” 2008. Doctoral Dissertation, University of Florida. Accessed January 23, 2021. https://ufdc.ufl.edu/UFE0022442.

MLA Handbook (7^th Edition):

Son, Seung-Young. “Nitrogen Incorporated Hafnia Gate Dielectric Thin Film and Titanium Based Metal Gate Electrode for Dual Gate Application.” 2008. Web. 23 Jan 2021.

Vancouver:

Son S. Nitrogen Incorporated Hafnia Gate Dielectric Thin Film and Titanium Based Metal Gate Electrode for Dual Gate Application. [Internet] [Doctoral dissertation]. University of Florida; 2008. [cited 2021 Jan 23]. Available from: https://ufdc.ufl.edu/UFE0022442.

Council of Science Editors:

Son S. Nitrogen Incorporated Hafnia Gate Dielectric Thin Film and Titanium Based Metal Gate Electrode for Dual Gate Application. [Doctoral Dissertation]. University of Florida; 2008. Available from: https://ufdc.ufl.edu/UFE0022442

University of Florida

23. Pilla, S., 1970- ( Dissertant ). Electric-field induced glass phase in molecular solids at low temperatures.

Degree: PhD, Physics, 1999, University of Florida

URL: https://ufdc.ufl.edu/UF00100709

► The simple molecular solids of CO and N2 have been the subject of intensive experimental and theoretical studies during the last three decades. The interest… (more)

▼ The simple molecular solids of CO and N2 have been the subject of intensive experimental and theoretical studies during the last three decades. The interest in these systems derives from the fact that they serve as prototypes for studying the underlying physics of the simplest glass formers. Dielectric measurements in these systems are particularly important because they directly probe the orientational ordering. Due to strongly hindered molecular rotations in these solids, the relevant time scales for collective molecular reorientation are expected to be in the audio frequency range, but due to the lack of required sensitivity in this range, such measurements have not been carried out in the past. I have developed an AC capacitance bridge with two parts per billion sensitivity in the audio frequency range for measuring the real part of the dielectric constant, which allows us to study the collective orientational properties of these molecular systems. The high sensitivity audio frequency dielectric measurements of solid CO and N2, have revealed unexpected new behaviors for these molecular solids. Strong hysteresis effects have been observed in the high temperature hcp phase of N2 and this is believed to originate from the strong geometrical frustration of the interactions. When the N2 samples are annealed in an external ac electric field stronger than ~20 V/m at frequencies ranging from few Hz to few MHz for ~20 hrs. in the 41.5 K < T < 56.5 K temperature range, spontaneous tunneling of the macroscopic polarization states is observed at various random temperatures upon cooling down to 4.2 K, along with strong hysteresis effects. This indicates that N2 has an yet not understood "electric field induced glass phase", whenever the solid samples are annealed as mentioned above. Also, I have observed strong lambda-like behavior of the dielectric constant of solid N2 at ~56 K, which may be interpreted as the thermodynamic glass transition temperature at which N2 undergoes a transition from high temperature orientational liquid (or disordered) phase to field cooled glass phase. Similar experiments on CO show neither the field induced glass phase nor any type of dipolar ordering (neither glass-like nor short range) down to 4.2 K. A simple phenomenological model based on the quantum mechanical treatment of molecular rotation is developed to explain their dielectric behavior. These measurements are extended to N2-Ar mixtures as well, and the traditional glass phase boundary of these mixtures is mapped much more accurately. The field induced glass phase with the associated thermodynamic glass transition temperature is also present up to 50% of Ar concentrations. This indicates that the mechanisms that drive this interesting glass phase are indeed very strong, and new experiments are necessary to understand this peculiar phase. ( ,, )

Subjects/Keywords: Audio frequencies; Capacitance; Dielectric materials; Electric fields; Electrical phases; Hysteresis; Low temperature; Molecules; Permittivity; Solid solutions; Glass

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APA (6^th Edition):

Pilla, S., 1. (. D. ). (1999). Electric-field induced glass phase in molecular solids at low temperatures. (Doctoral Dissertation). University of Florida. Retrieved from https://ufdc.ufl.edu/UF00100709

Chicago Manual of Style (16^th Edition):

Pilla, S., 1970- ( Dissertant ). “Electric-field induced glass phase in molecular solids at low temperatures.” 1999. Doctoral Dissertation, University of Florida. Accessed January 23, 2021. https://ufdc.ufl.edu/UF00100709.

MLA Handbook (7^th Edition):

Pilla, S., 1970- ( Dissertant ). “Electric-field induced glass phase in molecular solids at low temperatures.” 1999. Web. 23 Jan 2021.

Vancouver:

Pilla, S. 1(D). Electric-field induced glass phase in molecular solids at low temperatures. [Internet] [Doctoral dissertation]. University of Florida; 1999. [cited 2021 Jan 23]. Available from: https://ufdc.ufl.edu/UF00100709.

Council of Science Editors:

Pilla, S. 1(D). Electric-field induced glass phase in molecular solids at low temperatures. [Doctoral Dissertation]. University of Florida; 1999. Available from: https://ufdc.ufl.edu/UF00100709

University of Florida

24. Cua, Chun-Kiat, 1940-. Dielectric properties of pure organic liquids and binary liquid systems.

Degree: 1968, University of Florida

URL: https://ufdc.ufl.edu/AA00038791

Subjects/Keywords: Alcohols; Bromides; Dielectric materials; Dielectric polarization; Electric fields; Ethers; Liquids; Molecules; Permittivity; Solvents; Chemical Engineering thesis Ph. D; Dielectrics

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APA (6^th Edition):

Cua, Chun-Kiat, 1. (1968). Dielectric properties of pure organic liquids and binary liquid systems. (Thesis). University of Florida. Retrieved from https://ufdc.ufl.edu/AA00038791

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):

Cua, Chun-Kiat, 1940-. “Dielectric properties of pure organic liquids and binary liquid systems.” 1968. Thesis, University of Florida. Accessed January 23, 2021. https://ufdc.ufl.edu/AA00038791.

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

MLA Handbook (7^th Edition):

Cua, Chun-Kiat, 1940-. “Dielectric properties of pure organic liquids and binary liquid systems.” 1968. Web. 23 Jan 2021.

Vancouver:

Cua, Chun-Kiat 1. Dielectric properties of pure organic liquids and binary liquid systems. [Internet] [Thesis]. University of Florida; 1968. [cited 2021 Jan 23]. Available from: https://ufdc.ufl.edu/AA00038791.

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

Council of Science Editors:

Cua, Chun-Kiat 1. Dielectric properties of pure organic liquids and binary liquid systems. [Thesis]. University of Florida; 1968. Available from: https://ufdc.ufl.edu/AA00038791

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

University of Florida

25. Wong, Ngai M., 1961-. Application of time domain reflectometry to solution processes.

Degree: 1990, University of Florida

URL: https://ufdc.ufl.edu/AA00029749

Subjects/Keywords: Butanols; Conductivity; Critical frequencies; Dielectric materials; Electric fields; Micelles; Molecules; Permittivity; Pyridines; Solvents; Chemistry thesis Ph. D

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APA (6^th Edition):

Wong, Ngai M., 1. (1990). Application of time domain reflectometry to solution processes. (Thesis). University of Florida. Retrieved from https://ufdc.ufl.edu/AA00029749

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):

Wong, Ngai M., 1961-. “Application of time domain reflectometry to solution processes.” 1990. Thesis, University of Florida. Accessed January 23, 2021. https://ufdc.ufl.edu/AA00029749.

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

MLA Handbook (7^th Edition):

Wong, Ngai M., 1961-. “Application of time domain reflectometry to solution processes.” 1990. Web. 23 Jan 2021.

Vancouver:

Wong, Ngai M. 1. Application of time domain reflectometry to solution processes. [Internet] [Thesis]. University of Florida; 1990. [cited 2021 Jan 23]. Available from: https://ufdc.ufl.edu/AA00029749.

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

Council of Science Editors:

Wong, Ngai M. 1. Application of time domain reflectometry to solution processes. [Thesis]. University of Florida; 1990. Available from: https://ufdc.ufl.edu/AA00029749

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

Brno University of Technology

26. Procházka, Jan. Testování izolačních systémů elektrických strojů: Testing of insulating systems of electrical machines.

Degree: 2019, Brno University of Technology

URL: http://hdl.handle.net/11012/67645

This bachelor thesis defines basic required properties of insulation systems in rotating electric machines. The following are procedures for their testing and results of conducted tests. Advisors/Committee Members: Huzlík, Rostislav (advisor), Mach, Martin (referee).

Subjects/Keywords: Elektrický izolační systém; točivý elektrický stroj; elektrická pevnost; izolační materiál; dielektrické ztráty; průraz izolantu; rezistivita; permitivita; zkoušený předmět; zkouška odolnosti; diagnostický faktor.; Electrical insulation system; rotating electric machine; dielectric strength; insulating material; dielectric loss; insulation breakdown; resistivity; permittivity; tested subject; endurance test; diagnostic factor.

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APA (6^th Edition):

Procházka, J. (2019). Testování izolačních systémů elektrických strojů: Testing of insulating systems of electrical machines. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/67645

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):

Procházka, Jan. “Testování izolačních systémů elektrických strojů: Testing of insulating systems of electrical machines.” 2019. Thesis, Brno University of Technology. Accessed January 23, 2021. http://hdl.handle.net/11012/67645.

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

MLA Handbook (7^th Edition):

Procházka, Jan. “Testování izolačních systémů elektrických strojů: Testing of insulating systems of electrical machines.” 2019. Web. 23 Jan 2021.

Vancouver:

Procházka J. Testování izolačních systémů elektrických strojů: Testing of insulating systems of electrical machines. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Jan 23]. Available from: http://hdl.handle.net/11012/67645.

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

Council of Science Editors:

Procházka J. Testování izolačních systémů elektrických strojů: Testing of insulating systems of electrical machines. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/67645

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

ETH Zürich

27. Fejér, Georges. Versuche über die Anwendbarkeit des Hohlraumleiters zur Messung der dielektrischen Konstanten im Gebiet der cm-Wellen.

Degree: 1943, ETH Zürich

URL: http://hdl.handle.net/20.500.11850/136437

Subjects/Keywords: DIELEKTRIZITÄTSKONSTANTEN (ELEKTRISCHE MESSTECHNIK); PERMITTIVITY CONSTANTS (ELECTRICAL MEASUREMENT TECHNIQUE); info:eu-repo/classification/ddc/621.3; Electric engineering

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APA (6^th Edition):

Fejér, G. (1943). Versuche über die Anwendbarkeit des Hohlraumleiters zur Messung der dielektrischen Konstanten im Gebiet der cm-Wellen. (Doctoral Dissertation). ETH Zürich. Retrieved from http://hdl.handle.net/20.500.11850/136437

Chicago Manual of Style (16^th Edition):

Fejér, Georges. “Versuche über die Anwendbarkeit des Hohlraumleiters zur Messung der dielektrischen Konstanten im Gebiet der cm-Wellen.” 1943. Doctoral Dissertation, ETH Zürich. Accessed January 23, 2021. http://hdl.handle.net/20.500.11850/136437.

MLA Handbook (7^th Edition):

Fejér, Georges. “Versuche über die Anwendbarkeit des Hohlraumleiters zur Messung der dielektrischen Konstanten im Gebiet der cm-Wellen.” 1943. Web. 23 Jan 2021.

Vancouver:

Fejér G. Versuche über die Anwendbarkeit des Hohlraumleiters zur Messung der dielektrischen Konstanten im Gebiet der cm-Wellen. [Internet] [Doctoral dissertation]. ETH Zürich; 1943. [cited 2021 Jan 23]. Available from: http://hdl.handle.net/20.500.11850/136437.

Council of Science Editors:

Fejér G. Versuche über die Anwendbarkeit des Hohlraumleiters zur Messung der dielektrischen Konstanten im Gebiet der cm-Wellen. [Doctoral Dissertation]. ETH Zürich; 1943. Available from: http://hdl.handle.net/20.500.11850/136437

Brno University of Technology

28. Jeřábek, Michal. Analýza vícefaktorového namáhání elektroizolačních materiálů: Multistress ageing analysis of the electroinsulating materials.

Degree: 2019, Brno University of Technology

URL: http://hdl.handle.net/11012/7101

► This diploma thesis deals with not-aged and thermally, electric and multistress aged slotted isolations dielectric properities experimental probing. Dutiny experiment is watched influence moisture on… (more)

Subjects/Keywords: Dielektrické vlastnosti; elektroizolační materiál; tepelné namáhání; elektrické namáhání; kombinované namáhání; relativní vlhkost; relativní permitivita; ztrátové číslo; kmitočet.; Dielectric properties; electroinsulating materiál; thermal ageing; electric ageing; multistress agening; relative humidity; relative permittivity; lost numer; frequency.

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APA (6^th Edition):

Jeřábek, M. (2019). Analýza vícefaktorového namáhání elektroizolačních materiálů: Multistress ageing analysis of the electroinsulating materials. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/7101

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):

Jeřábek, Michal. “Analýza vícefaktorového namáhání elektroizolačních materiálů: Multistress ageing analysis of the electroinsulating materials.” 2019. Thesis, Brno University of Technology. Accessed January 23, 2021. http://hdl.handle.net/11012/7101.

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

MLA Handbook (7^th Edition):

Jeřábek, Michal. “Analýza vícefaktorového namáhání elektroizolačních materiálů: Multistress ageing analysis of the electroinsulating materials.” 2019. Web. 23 Jan 2021.

Vancouver:

Jeřábek M. Analýza vícefaktorového namáhání elektroizolačních materiálů: Multistress ageing analysis of the electroinsulating materials. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Jan 23]. Available from: http://hdl.handle.net/11012/7101.

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

Council of Science Editors:

Jeřábek M. Analýza vícefaktorového namáhání elektroizolačních materiálů: Multistress ageing analysis of the electroinsulating materials. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/7101

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

29. Duong, Danny. The complex dielectric properties of aqueous ammonia from 2 GHz - 8.5 GHz in support of the NASA Juno mission.

Degree: MS, Electrical and Computer Engineering, 2011, Georgia Tech

URL: http://hdl.handle.net/1853/42891

► A new model for the complex dielectric constant, ε, of aqueous ammonia (NH4OH) has been developed based on laboratory measurements in the frequency range between… (more)

Subjects/Keywords: Complex dielectric; Aqueous ammonia; Electric permittivity; Liquid ammonia; Ammonia; Dielectrics; Liquid dielectrics

…permittivity, ε, and the intermolecular response of a liquid polar substance to an external electric… …Here, ε⚭ is the electric permittivity at the high frequency limit, εs is the static electric… …water) in S/m, ε0 is the electric permittivity at vacuum, and η is the Cole-Cole spread… …electric permittivity. For a perfectly-insulating dielectric material, where conductivity is zero… …ε e " . The concept of a complex electric permittivity arises from the j ⋅ω non…

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APA (6^th Edition):

Duong, D. (2011). The complex dielectric properties of aqueous ammonia from 2 GHz - 8.5 GHz in support of the NASA Juno mission. (Masters Thesis). Georgia Tech. Retrieved from http://hdl.handle.net/1853/42891

Chicago Manual of Style (16^th Edition):

Duong, Danny. “The complex dielectric properties of aqueous ammonia from 2 GHz - 8.5 GHz in support of the NASA Juno mission.” 2011. Masters Thesis, Georgia Tech. Accessed January 23, 2021. http://hdl.handle.net/1853/42891.

MLA Handbook (7^th Edition):

Duong, Danny. “The complex dielectric properties of aqueous ammonia from 2 GHz - 8.5 GHz in support of the NASA Juno mission.” 2011. Web. 23 Jan 2021.

Vancouver:

Duong D. The complex dielectric properties of aqueous ammonia from 2 GHz - 8.5 GHz in support of the NASA Juno mission. [Internet] [Masters thesis]. Georgia Tech; 2011. [cited 2021 Jan 23]. Available from: http://hdl.handle.net/1853/42891.

Council of Science Editors:

Duong D. The complex dielectric properties of aqueous ammonia from 2 GHz - 8.5 GHz in support of the NASA Juno mission. [Masters Thesis]. Georgia Tech; 2011. Available from: http://hdl.handle.net/1853/42891

30. Μανωλακάκη, Ελένη. Ηλεκτρικές ιδιότητες σύνθετων πολυμερικών υλικών με αγώγιμα κοκκώδη πρόσθετα.

Degree: 2002, National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ)

URL: http://hdl.handle.net/10442/hedi/16696

► Στην παρούσα εργασία εξετάζεται η διηλεκτρική συμπεριφορά και η αγωγιμότητα σύνθετων πολυμερικών συστημάτων εποξειδικής μήτρας με κοκκώδη συστατικά Cu, Ni και Fe. Στα σύνθετα ρητίνης… (more)

▼ Στην παρούσα εργασία εξετάζεται η διηλεκτρική συμπεριφορά και η αγωγιμότητα σύνθετων πολυμερικών συστημάτων εποξειδικής μήτρας με κοκκώδη συστατικά Cu, Ni και Fe. Στα σύνθετα ρητίνης - μεταλλικών σκονών, η μέγιστη περιεκτικότητα σε κόκκους μετάλλου μεταβάλλεται, ανάλογα με τον τύπο του εγκλείσματος. Αναλυτικότερα κατασκευάστηκαν τα ακόλουθα δοκίμια: • Δοκίμια καθαρής ρητίνης • Δοκίμια καθαρής ρητίνης με χαλκό σε συγκεντρώσεις κ. β. : 10, 20, 30, 40, 50, 60, 64% • Δοκίμια καθαρής ρητίνης με σίδηρο σε συγκεντρώσεις κ.β. : 10, 20, 30, 40, 50, 60% • Δοκίμια καθαρής ρητίνης με νικέλιο σε συγκεντρώσεις κ.β. : 10, 20, 30, 40, 50, 60, 70%. Η διηλεκτρική συμπεριφορά των συνθέτων συστημάτων μελετάται με παραμέτρους το ογκομετρικό κλάσμα των πληρωτικών μέσων, τη συχνότητα του εφαρμοζόμενου ηλεκτρικού πεδίου και τη θερμοκρασία. Η πειραματική εξέταση των δοκιμίων, σε σχέση με τη διηλεκτρική τους συμπεριφορά, γίνεται σε φάσμα συχνοτήτων 20Ηζ έως 13ΜΗζ, ενώ το εύρος των θερμοκρασιών κυμαίνεται από 35°C έως 140°C. Οι μετρήσεις που διεξήχθησαν οδήγησαν στα ακόλουθα συμπεράσματα: • Στις χαμηλές συχνότητες παρατηρείται έντονο φαινόμενο διεπιφανειακής πόλωσης • Όταν όλες οι άλλες παράμετροι παραμένουν σταθερές και μόνο η συχνότητα μεταβάλλεται προκύπτει ότι αύξηση της συχνότητας οδηγεί σε μείωση της διηλεκτρικής διαπερατότητας, ενώ η παρατήρηση της συμπεριφοράς δοκιμίων του ίδιου εγκλείσματος σε διαφορετικές περιεκτικότητες έδειξε ότι σε αντίστοιχες τιμές συχνότητας, με την αύξηση συγκέντρωσης, παρουσιάζεται αύξηση των τιμών διηλεκτρικής διαπερατότητας. • Όταν όλες οι άλλες παράμετροι παραμένουν σταθερές και μόνο η θερμοκρασία μεταβάλλεται, άνω) του σημείου υαλώδους μεταπτώσεως (Tg) οδηγεί σε έντονη αύξηση της διηλεκτρικής διαπερατότητας ενώ η σύγκριση μεταξύ των τιμών διηλεκτρικής διαπερατότητας ίδιου είδους εγκλείσματος αλλά διαφορετικών συγκεντρώσεων φανέρωσε μικρή διαφοροποίηση καθώς μεταβαλλόταν η θερμοκρασία • Όταν όλες οι άλλες παράμετροι παραμένουν σταθερές και μόνο η συχνότητα μεταβάλλεται κατά την παρατήρηση της συμπεριφοράς δοκιμίων του ίδιου εγκλείσματος αλλά διαφορετικών περιεκτικοτήτων σε αντίστοιχες μεταβολές συχνότητας παρατηρείται ότι η αύξηση της συγκέντρωσης του μεταλλικού προσθέτου οδηγεί σε αύξηση των διηλεκτρικών απωλειών. • Όταν όλες οι άλλες παράμετροι παραμένουν σταθερές και μόνο η θερμοκρασία μεταβάλλεται, οδηγεί σε αύξηση των διηλεκτρικών απωλειών που γίνονται εντονότερες πέρα του σημείου υαλώδους μεταπτώσεως (Tg). Σημειώνεται ότι στις χαμηλές συχνότητες η καμπύλη των διηλεκτρικών απωλειών εμφανίζει κορυφή που μετακινείται προς μικρότερες συχνότητες και υψηλότερες τιμές απωλειών καθώς αυξάνει η συγκέντρωση κάθε εγκλείσματος. Κατόπιν, διερευνήθηκε η εξάρτηση από τη συχνότητα των υπολογιστικών εξισώσεων της διηλεκτρικής συμπεριφοράς σύνθετων συστημάτων διηλεκτρικής μήτρας - αγώγιμων πληρωτικών μέσων και ακολούθησε έλεγχος της συμβατότητας της θεωρητικά προβλεπόμενης συμπεριφοράς με την πειραματικά διαπιστούμενη. Τα αποτελέσματα της σύγκρισης κρίνονται πολύ ικανοποιητικά. Η αγώγιμη συμπεριφορά των συνθέτων…

Subjects/Keywords: Αγωγιμότητα; Διηλεκτρικές απώλειες; Διηλεκτρική διαπερατότητα; Ηλεκτρικό μέτρο; Σύνθετα; Χαλάρωση; Composites; Conductivity; Dielectric losses; Dielectric permittivity; Electric modulus; Relaxation

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APA (6^th Edition):

Μανωλακάκη, . �. (2002). Ηλεκτρικές ιδιότητες σύνθετων πολυμερικών υλικών με αγώγιμα κοκκώδη πρόσθετα. (Thesis). National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ). Retrieved from http://hdl.handle.net/10442/hedi/16696

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):

Μανωλακάκη, Ελένη. “Ηλεκτρικές ιδιότητες σύνθετων πολυμερικών υλικών με αγώγιμα κοκκώδη πρόσθετα.” 2002. Thesis, National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ). Accessed January 23, 2021. http://hdl.handle.net/10442/hedi/16696.

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

MLA Handbook (7^th Edition):

Μανωλακάκη, Ελένη. “Ηλεκτρικές ιδιότητες σύνθετων πολυμερικών υλικών με αγώγιμα κοκκώδη πρόσθετα.” 2002. Web. 23 Jan 2021.

Vancouver:

Μανωλακάκη �. Ηλεκτρικές ιδιότητες σύνθετων πολυμερικών υλικών με αγώγιμα κοκκώδη πρόσθετα. [Internet] [Thesis]. National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ); 2002. [cited 2021 Jan 23]. Available from: http://hdl.handle.net/10442/hedi/16696.

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

Council of Science Editors:

Μανωλακάκη �. Ηλεκτρικές ιδιότητες σύνθετων πολυμερικών υλικών με αγώγιμα κοκκώδη πρόσθετα. [Thesis]. National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ); 2002. Available from: http://hdl.handle.net/10442/hedi/16696

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

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