Download or read book Thermally stimulated Current and Dielectric Properties of Doped and Undoped Barium Titanate written by Wayne Huebner and published by . This book was released on 1987 with total page 353 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Materials for Energy Conversion Devices written by C C Sorrell and published by Elsevier. This book was released on 2005-10-30 with total page 433 pages. Available in PDF, EPUB and Kindle. Book excerpt: As the finite capacity and pollution problems of fossil fuels grow more pressing, new sources of more sustainable energy are being developed. Materials for energy conversion devices summarises the key research on new materials which can be used to generate clean and renewable energy or to help manage problems from existing energy sources.The book discusses the range of materials that can be used to harness and convert solar energy in particular, including the properties of oxide materials and their use in producing hydrogen fuel. It covers thermoelectric materials and devices for power generation, ionic conductors and new types of fuel cell. There are also chapters on the use of such materials in the immobilisation of nuclear waste and as electrochemical gas sensors for emission control.With its distinguished editors and international team of contributors, Materials for energy conversion devices is a standard reference for all those researching and developing a new generation of materials and technologies for our energy need. - Detailed coverage of solar energy and thermoelectric conversion - Comprehensive survey of new developments in this exciting field - Edited by leading experts in the field with contributions from an international team of authors
Download or read book Ferroelectrics Literature Index written by T. F. Connolly and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 713 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research on ferroelectricity and ferroelectric materials started in 1920 with the discovery by Valasek that the variation of spontaneous polarization in Rochelle salt with sign and magnitude of an applied electric field traced a complete and reproducible hysteresis loop. Activity in the field was sporadic until 1935, when Busch and co-workers announced the observation of similar behavior in potassium dihydrogen phosphate and related compounds. Progress thereafter continued at a modest level with the undertaking of some theoretical as well as further experimental studies. In 1944, von Hippel and co-workers discovered ferroelectricity in barium titanate. The technological importance of ceramic barium titanate and other perovskites led to an upsurge of interest, with many new ferroelectrics being identified in the following decade. By 1967, about 2000 papers on various aspects of ferroelectricity had been published. The bulk of this widely dispersed literature was concerned with the experimental measurement of dielectric, crystallographic, thermal, electromechanical, elastic, optical, and magnetic properties. A critical and excellently organized cpmpilation based on these data appeared in 1969 with the publica tion of Landolt-Bornstein, Volume 111/3. This superb tabulation gave instant access to the results in the literature on nearly 450 pure substances and solid solutions of ferroelectric and antiferroelectric materials. Continuing interest in ferroelectrics, spurred by the growing importance of electrooptic crystals, resulted in the publication of almost as many additional papers by the end of 1969 as had been surveyed in Landolt-Bornstein.
Download or read book Structure and Dielectric Properties of Pure and Zinc Oxide Doped Barium Titanate written by M. Hasan and published by . This book was released on 2013 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effects of zinc oxide addition and sintering parameters on the structure and dielectric properties of barium titanate are observed. Different percentage of ZnO ranging from 0.30 to 1 wt. % is doped in barium titanate. Both the doped and undoped samples are sintered at temperatures ranging from 1250°C to 1325°C at different soaking times. The amount of densification of the doped and undoped samples is measured in terms of percentage theoretical density. Grain size and microstructural analysis is performed by a scanning electron microscope (SEM). Lattice parameters and tetragonality of doped and undoped barium titanate are calculated from x-ray diffraction pattern obtained from x-ray diffractometer (XRD) test. Dielectric properties of the samples are measured by an impedance analyzer. It is found that all the doped samples obtain their maximum percentage theoretical density at a lower sintering temperature compared to the undoped sample. SEM study reveals that the doped samples always show smaller grains compared to the undoped sample. Significant grain growth is observed in all of the samples at sintering temperatures above 1300°C. The evidence of surface melting is observed in 1 wt. % ZnO-doped sample soaked at 1325°C for 2 h. The presence of liquid at that sintering condition is explained by the doping mechanism of Zn2+ in BaTiO3. Correlation among the grain size, tetragonality, and dielectric properties of the doped and undoped samples are also discussed.
Download or read book A Study of Structure Electrical Properties and Electrical Degradation of Undoped and Nickel Doped Barium Titanate written by Sudhir R. Kulkarni and published by . This book was released on 1986 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Thermal Diffusivity and Dielectric Properties of Strontium doped Barium Titanate and Calcium Titanate Systems written by Noor Jawad Ridha and published by . This book was released on 2009 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book American Doctoral Dissertations written by and published by . This book was released on 1987 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dielectric Properties and Ageing of Acceptor doped Barium Titanate Ceramics written by Mahmud Mansur Ben Omran and published by . This book was released on 1997 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ISAF 86 written by and published by . This book was released on 1986 with total page 778 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of Indo United States Workshop on Electronic Ceramics and Materials written by A. S. Bhalla and published by CRC Press. This book was released on 1990 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Index to American Doctoral Dissertations written by and published by . This book was released on 1989 with total page 1252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Japanese Journal of Applied Physics written by and published by . This book was released on 2006 with total page 1500 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modulating the Effect of Yttrium Doping on the Structural and Dielectric Properties of Barium Titanate written by and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electrical Degradation in High Purity Barium Titanate written by Jeffrey Duncan Keck and published by . This book was released on 1976 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The stability of BaTiO3-type insulators to DC fields has long been recognized as one of the important factors in determining the quality of a capacitor which uses such a material as its dielectric. The slow increase of the electrical conductivity of an insulator which is stressed by DC fields at levels below the breakdown strength is normally termed degradation. Since degradation is a very common malady to the ceramic capacitor manufacturers, many studies have been conducted over the past two decades in efforts to learn how to remedy the problem. The results of previous studies have shown that certain dopants (present both as intentional additives and as impurities), the Ba:Ti ratio, and hydroxyl content greatly influence the degradation process. Since all of the studies have been carried out on ill-defined commercial materials, no correlation between defect structure and degradation has been possible. It was the intent of this present investigation to study degradation in well-defined BaTiO3 (both high purity and intentionally doped) with the intent of developing a defect model which can be used to explain the influence of dopants and Ba:Ti ratio upon degradation. High purity BaTiO3 powder was prepared by a chemical preparation technique which allows the ratio of cations and dopant levels to be precisely controlled. The DC current-voltage characteristics of sintered discs were measured as a function of both time and temperature. Undoped BaTiO3 with a Ba:Ti ratio less than unity had the greatest tendency to degrade. Undoped and acceptor doped material with a Ba:Ti ratio greater than unity had a high resistance to degradation. Donor and acceptor doping with a Ba:Ti ratio less than unity improved the degradation resistance while donor doping with a Ba:Ti ratio greater than one increased the degradation. To explain the observed behavior, a model is presented that includes the effect of acceptors, donors, and the Ba:Ti ratio on the degradation process"--Abstract, leaves ii-iii
Download or read book Physics Briefs written by and published by . This book was released on 1994 with total page 934 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1998 with total page 980 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book British Ceramic Abstracts written by and published by . This book was released on 1985 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt:
