Dielectric Ceramics
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Dielectric Ceramics
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Author : K. M. Nair
language : en
Publisher:
Release Date : 1993
Dielectric Ceramics written by K. M. Nair and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Technology & Engineering categories.
Ceramic Dielectrics And Capacitors
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Author : J.M. Herbert
language : en
Publisher: CRC Press
Release Date : 1985-01-01
Ceramic Dielectrics And Capacitors written by J.M. Herbert and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985-01-01 with Science categories.
Detailed study of the composition, physical properties, and manufacturing methods of ceramic dielectrics and capacitors in light of recent commercial developments and influences. Covers the essential theory and applications for electrical engineers wanting informed insight into the characteristics, advantages, and limitations of this class of capacitors, and for ceramicists seeking to improve their electrical expertise.
Morphotropic Phase Boundary Perovskites High Strain Piezoelectrics And Dielectric Ceramics
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Author : Ruyan Guo
language : en
Publisher: John Wiley & Sons
Release Date : 2012-04-11
Morphotropic Phase Boundary Perovskites High Strain Piezoelectrics And Dielectric Ceramics written by Ruyan Guo and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-04-11 with Technology & Engineering categories.
Proceedings of the Symposium on Dielectric Materials and Multilayer Electronic Devices and the Symposium on Morphotropic Phase Boundary Phenomena and Perovskite Materials, held April 28 - May 1, 2002, in St. Louis, Missouri, during the 104th Annual Meeting of the American Ceramic Society, and the Focused Session on High Strain Piezoelectrics, held April 22-25, 2001, in Indianapolis, Indiana, during the 103rd Annual Meeting of the American Ceramic Society.
Microwave Materials And Applications
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Author : Mailadil T. Sebastian
language : en
Publisher: John Wiley & Sons
Release Date : 2017-03-02
Microwave Materials And Applications written by Mailadil T. Sebastian and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-03-02 with Technology & Engineering categories.
Die jüngsten Fortschritte im Bereich der drahtlosen Telekommunikation und dem Internet der Dinge sorgen bei drahtlosen Systemen, beim Satellitenfernsehen und bei intelligenten Transportsystemen der 5. Generation für eine höhere Nachfrage nach dielektrischen Materialien und modernen Fertigungstechniken. Diese Materialien bieten ausgezeichnete elektrische, dielektrische und thermische Eigenschaften und verfügen über enormes Potenzial, vor allem bei der drahtlosen Kommunikation, bei flexibler Elektronik und gedruckter Elektronik. Microwave Materials and Applications erläutert die herkömmlichen Methoden zur Messung der dielektrischen Eigenschaften im Mikrowellenbereich, die verschiedenen Ansätze zur Lösung von Problemen der Materialchemie und von Kristallstrukturen, in den Bereichen Doping, Substitution und Aufbau von Verbundwerkstoffen. Besonderer Schwerpunkt liegt auf Verarbeitungstechniken, Einflüssen der Morphologie und der Anwendung von Materialien in der Mikrowellentechnik. Gleichzeitig werden viele der jüngsten Forschungserkenntnisse bei Mikrowellen-Dielektrika und -Anwendungen zusammengefasst. Die verschiedenen Kapitel untersuchen: Oxidkeramiken für dielektrische Resonatoren und Substrate, HTCC-, LTCC- und ULTCC-Bänder für Substrate, Polymer-Keramik-Verbundstoffe für Leiterplatten, Elastomer-Keramik-Verbundstoffe für flexible Elektronik, dielektrische Tinten, Materialien für die EMV-Abschirmung, Mikrowellen-Ferrite. Ein umfassender Anhang präsentiert die grundlegenden Eigenschaften von mehr als 4000 verlustarmen dielektrischen Keramiken, deren Zusammensetzung, kristalline Struktur und dielektrischen Eigenschaften für Mikrowellenanwendungen. Microwave Materials and Applications wirft einen Blick auf sämtliche Aspekte von Mikrowellenmaterialien und -anwendungen, ein nützliches Handbuch für Wissenschaftler, Unternehmen, Ingenieure und Studenten, die sich mit heutigen und neuen Anwendungen in den Bereichen drahtlose Kommunikation und Unterhaltungselektronik beschäftigen.
Titanate Based Ceramic Dielectric Materials
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Author : R. Saravanan
language : en
Publisher: Materials Research Forum LLC
Release Date : 2018-02-25
Titanate Based Ceramic Dielectric Materials written by R. Saravanan and has been published by Materials Research Forum LLC this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-02-25 with Technology & Engineering categories.
Barium titanate is one of the most important electronic materials; due to its high permittivity, low dielectric loss and high tunability. The environment friendly material is suitable for microphones and microwave device applications such as tunable capacitors, delay lines, filters, resonators and phase shifters. Doped titanates are extensively used for various electronic devices, such as transducers, piezoelectric actuators, passive memory storage devices, dynamic random access memory (DRAM), multilayer ceramic capacitors (MLCCs), positive temperature coefficient resistors (PTCR), optoelectronic devices and infrared sensors. The book presents research results concerning the electron density distribution in a number of doped barium titanate ceramic materials using experimental X-ray diffraction data, UV-visible spectrophotometry (UV-vis), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). The analysis of interatomic bonding and electron density distribution is important for predicting the properties of potentially important materials and has previously been lacking for the materials studied. Barium Titanate, Barium Titanate Doping, Dielectric Ceramics, Permittivity, Tunability, Transducers, Piezoelectric Actuators, Memory Storage Devices, Multilayer Ceramic Capacitors, Optoelectronic Devices, X-Ray Diffraction Data, UV-Visible Spectrophotometry, Energy Dispersive X-Ray Spectroscopy, Interatomic Bonding, Electron Density Distribution, Ceramic Property Predictions.
Advances In Dielectric Ceramic Materials
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Author : K. M. Nair
language : en
Publisher:
Release Date : 1998
Advances In Dielectric Ceramic Materials written by K. M. Nair and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with Technology & Engineering categories.
Contains 43 articles on such topics as: causes of dielectric dispersion in ferroelectric materials, microwave characterization of dielectric ceramics for wireless communications, dielectric properties of barium titanate ceramics as a function of grain size, single domain intrinsic properties of meso
Drying Ceramics In Ultrahigh Frequency Electrical Fields
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Author : Watertown Arsenal (Mass.). Laboratories
language : en
Publisher:
Release Date : 1961
Drying Ceramics In Ultrahigh Frequency Electrical Fields written by Watertown Arsenal (Mass.). Laboratories and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1961 with Ceramics categories.
The program undertaken was designed to determine the applicability of dielectric heating to the drying of ceramic components fabricated by wet processing techniques. The general characteristics of dielectric drying were studied along with the specific moisture removal characteristics for a typical wet-processed ceramic composition (50% clay, 25% flint, 25% feldspar). The results obtained in this investigation showed that rapid drying rates for ceramics are possible with the dielectric heating method. Wet ceramic components can be heated and dried uniformly in the electric field without the development of severe temperature and moisture gradients which might lead to cracking and/or warping of the components. Although drying rates were found to be extremely high, they are limited by the rupture strength of the material, i.e., its ability to withstand the stresses developed by the pressure of the escaping water vapor. Dielectric drying holds interesting possibilities for drying high-cost ceramic components or component systems which are difficult to process by other techniques. (Author).
Advances In Electronic Ceramic Materials
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Author : Sheng Yao
language : en
Publisher: John Wiley & Sons
Release Date : 2009-09-28
Advances In Electronic Ceramic Materials written by Sheng Yao and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009-09-28 with Technology & Engineering categories.
The focus of this collection is on recent research and development related to a variety of sensor technologies as well as the latest advances concerning the synthesis and characterization of dielectric, piezoelectric, and ferroelectric materials.
Temperature And Frequency Dependence Of Complex Permittivity In Metal Oxide Dielectrics Theory Modelling And Measurement
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Author : Jonathan Breeze
language : en
Publisher: Springer
Release Date : 2016-09-08
Temperature And Frequency Dependence Of Complex Permittivity In Metal Oxide Dielectrics Theory Modelling And Measurement written by Jonathan Breeze and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-09-08 with Technology & Engineering categories.
This thesis investigates the dielectric properties of metal-oxide ceramics at microwave frequencies. It also demonstrates for the first time that a theory of harmonic phonon coupling can effectively predict the complex permittivity of metal oxides as a function of temperature and frequency. Dielectric ceramics are an important class of materials for radio-frequency, microwave and emergent terahertz technologies. Their key property is complex permittivity, the real part of which permits the miniaturisation of devices and the imaginary part of which is responsible for the absorption of electromagnetic energy. Absorption limits the practical performance of many microwave devices such as filters, oscillators, passive circuits and antennas. Complex permittivity as a function of temperature for low-loss dielectrics is determined by measuring the resonant frequency of dielectric resonators and using the radial mode matching technique to extract the dielectric properties. There have been only a handful of publications on the theory of dielectric loss, and their predictions have often been unfortunately unsatisfactory when compared to measurements of real crystals, sometimes differing by whole orders of magnitude. The main reason for this is the lack of accurate data for a harmonic coupling coefficient and phonon eigenfrequencies at arbitrary q vectors in the Brillouin zone. Here, a quantum field theory of losses in dielectrics is applied, using results from density functional perturbation theory, to predict from first principles the complex permittivity of metal oxides as functions of frequency and temperature.
Development Of Complex Perovskite Dielectric Ceramics For High Temperature Capacitor Applications
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Author : Natthaphon Raengthon
language : en
Publisher:
Release Date : 2013
Development Of Complex Perovskite Dielectric Ceramics For High Temperature Capacitor Applications written by Natthaphon Raengthon and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with Barium compounds categories.
Dielectric ceramics designed for capacitor applications for use in extreme environments, such as high temperatures, high voltages, or high-pressure environments, are in great demand. Existing capacitor technology fails to perform within these extreme conditions or such environments. The development of new dielectric ceramic materials for high temperature capacitor applications is of specific interest in this study. Two major factors that influence the performance of dielectric ceramics, including a high insulation resistance and high permittivity were investigated. Complex perovskites based on BaTiO3 - Bi(Zn1/2Ti1/2)O3 (BT-BZT) compounds are the focus of this study due to the existence of a linear dielectric behavior persisting with high permittivity, which is highly suitable for use in demanding capacitor applications. Compositions of complex perovskite based on BT-BZT compounds were fabricated using a solid-state reaction technique. By understanding conduction mechanisms of pseudo-binary BT-BZT, the high insulation resistance dielectric ceramics can be controlled. Pseudo-ternary BaTiO3 - Bi(Zn1/2Ti1/2)O3 - ABO3 compounds were also explored, where ABO3 represents BiInO3, BiScO3, and NaNbO3, in order to develop dielectric ceramics that exhibit a temperature- stable permittivity over a wide temperature range, particularly at high temperatures, while maintaining their high permittivity characteristics. The addition of small concentration of dopants and the control of stoichiometry of the BT-BZT compounds significantly affected the insulation behavior. The improved insulation resistance, especially at high temperatures (> 200 °C), can be obtained via the introduction of Ba-vacancies into the compound. The intrinsic conduction mechanism, the electrically homogeneous microstructure, and the presence of Ba-vacancy - O- vacancy (VBa-VO) defect associates as a trap site were observed to govern the high insulation resistance of the Ba-deficient BT-BZT compounds. In contrast, the electrically inhomogeneous microstructure and an oxygen vacancy-based conduction mechanism were the main factors giving rise to low insulation resistance behavior at high temperatures for the stoichiometric BT-BZT compound. The formation of pseudo-ternary BT-BZT-ABO3 complex perovskite strongly modified the dielectric characteristics to a more temperature-stable permittivity in the case of ABO3 is BiInO3 and BiScO3. With a combination of pseudo-ternary compositions and control of the non-stoichiometry in the BT-BZT-BiScO3 system, a temperature stable dielectric response was obtained over a broad temperature ranges (T> 100 °C), with a high permittivity (> 1000), and a high insulation resistance at elevated temperatures (> 200 °C). Additionally, the temperature-stable permittivity could be extended to low temperatures (