Описание: 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.
Автор: Loucas G. Christophorou; James K. Olthoff Название: Gaseous Dielectrics IX ISBN: 146135143X ISBN-13(EAN): 9781461351436 Издательство: Springer Рейтинг: Цена: 27950.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: Gaseous Dielectrics IX covers recent advances and developments in a wide range of basic, applied, and industrial areas of gaseous dielectrics.
Автор: Loucas C. Christophorou; James K. Olthoff; Panayot Название: Gaseous Dielectrics X ISBN: 1461347459 ISBN-13(EAN): 9781461347453 Издательство: Springer Рейтинг: Цена: 19564.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Автор: I.S. Zheludev Название: Physics of Crystalline Dielectrics ISBN: 146158986X ISBN-13(EAN): 9781461589860 Издательство: Springer Рейтинг: Цена: 13060.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: Research in solid-state physics in general and in the physics of dielectrics in particular has grown rapidly in scope and quan- tity in the last twenty-five years. In the fifties and early sixties, there was an upsurge of interest in ferroelectricity, piezoelectrici- ty, and pyroelectricity. The classical physics of dielectrics, rep- resented by books of H. Frohlich, C. P. Smyth, G. I. Skanavi, and A. von Hippel, is now unthinkable without ferroelectricity. The structure and properties of ferroelectrics have been described in a number of books and reviews, including those of W. Kanzig, H. D. Megaw, F. Jona and G. Shirane, W. J. Merz and E. Fatuzzo. The present work deals with the physics of crystalline di- electrics and is based on the investigations carried out by scien- tists throughout the world. But, understandably, the emphasis is on the research done in the USSR, particularly in the author's labo- ratory. A special feature of this two-volume treatise is the pro- minent place given to the symmetry and structure of dielectrics and to the importance of spontaneous electric polarization in many properties of crystals. In fact, these aspects take up the whole of the first volume. The second volume is concerned mainly with various properties and phenomena whose nature is illustrated by considering specific crystals. Thus, for example, the phenomena of polarization, piezoelectricity, electrostriction, etc., are first discussed in detail. Then follow descriptions of these phenomena in specific compounds.
Автор: Loucas G. Christophorou; D.R. James Название: Gaseous Dielectrics VII ISBN: 1489912975 ISBN-13(EAN): 9781489912978 Издательство: Springer Рейтинг: Цена: 27950.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: The Seventh International Symposium on Gaseous Dielectrics was held in Knoxville, Tennessee, U. It is hoped that Gaseous DielecIries VII will aid future research and development in, and encourage wider industrial use of, gaseous dielectrics. The Organizing Committee of the Seventh International Symposium on Gaseous Dielectrics consisted of G.
Автор: Loucas C. Christophorou; James K. Olthoff; Panayot Название: Gaseous Dielectrics X ISBN: 0387232982 ISBN-13(EAN): 9780387232980 Издательство: Springer Рейтинг: Цена: 20962.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: Contains a review of the progress and the problems in gaseous dielectrics and their use, especially as insulators in high-voltage equipment and substations. This work includes advances in superconductivity for power transmission and in plasma technology. It includes fundamental, applied and industrial research.
Автор: Loucas G. Christophorou; James K. Olthoff Название: Gaseous Dielectrics VIII ISBN: 1461372216 ISBN-13(EAN): 9781461372219 Издательство: Springer Рейтинг: Цена: 26122.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: Gaseous Dielectrics VIII covers recent advances and developments in a wide range of basic, applied, and industrial areas of gaseous dielectrics.
Автор: Gianfranco Pacchioni; Linards Skuja; David L. Gris Название: Defects in SiO2 and Related Dielectrics: Science and Technology ISBN: 0792366859 ISBN-13(EAN): 9780792366850 Издательство: Springer Рейтинг: Цена: 41787.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: Silicon dioxide plays a central role in most contemporary electronic and photonic technologies. This book provides a general description of the influence that point defects have on the global properties of the bulk material and their spectroscopic characterization through ESR and optical spectroscopy.
Автор: Loucas G. Christophorou; Eugen Illenberger; Werner Название: Linking the Gaseous and Condensed Phases of Matter ISBN: 1461360838 ISBN-13(EAN): 9781461360834 Издательство: Springer Рейтинг: Цена: 6986.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: Proceedings of a NATO ASI held in Patras, Greece, September 5-18, 1993
ООО "Логосфера " Тел:+7(495) 980-12-10 www.logobook.ru
