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Evaluation of Dielectric Permittivity of Barium Titanate Fine Powders

Published online by Cambridge University Press:  01 February 2011

Takaaki Tsurumi
Affiliation:
Graduate School of Science and Engineering, Tokyo Institute of Technology, 2–12–1 Ookayama, Meguro-ku, Tokyo 152–8552, Japan
Takashi Sekine
Affiliation:
Graduate School of Science and Engineering, Tokyo Institute of Technology, 2–12–1 Ookayama, Meguro-ku, Tokyo 152–8552, Japan
Hirofumi Kakemoto
Affiliation:
Graduate School of Science and Engineering, Tokyo Institute of Technology, 2–12–1 Ookayama, Meguro-ku, Tokyo 152–8552, Japan
Takuya Hoshina
Affiliation:
Graduate School of Science and Engineering, Tokyo Institute of Technology, 2–12–1 Ookayama, Meguro-ku, Tokyo 152–8552, Japan
Song-Min Nam
Affiliation:
Graduate School of Science and Engineering, Tokyo Institute of Technology, 2–12–1 Ookayama, Meguro-ku, Tokyo 152–8552, Japan National Institute of Advanced Industrial Science and Technology, 1–2 Namiki, Tsukuba, Ibaraki 305–8564, Japan
Hiroaki Yasuno
Affiliation:
Graduate School of Science and Engineering, Tokyo Institute of Technology, 2–12–1 Ookayama, Meguro-ku, Tokyo 152–8552, Japan
Satoshi Wada
Affiliation:
Graduate School of Science and Engineering, Tokyo Institute of Technology, 2–12–1 Ookayama, Meguro-ku, Tokyo 152–8552, Japan
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Abstract

Dielectric permittivity (εr) of BaTiO3(BTO) powders was determined by measuring εr of slurries prepared from BTO powder and propylene carbonate as dispersion medium, followed by analyzing with a finite element methods (FEM). The εr of powders depended on their characters such as tetragonality (c/a ratio), density, particle size and specific surface area. In order to extract the effect of each character, a statistical analysis was carried out to represent the εr of powders with an empirical formula, where the c/a ratio, density and particle size were used as parameters. A fairly good agreement between observed data and those expected from the formula was obtained and the contribution of each character to the εr could be determined.

Type
Research Article
Copyright
Copyright © Materials Research Society 2005

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References

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