Dielectric properties of barium titanate ceramics with nano-sized domain

Yoichi Kigoshi, Saki Hatta, Takashi Teranishi, Takuya Hoshina, Hiroaki Takeda, Osamu Sakurai, Takaaki Tsurumi

研究成果

4 被引用数 (Scopus)

抄録

Barium titanate (BaTiO3) ceramics with various grain sizes from 0.7 to 13 μm on average were prepared by a conventional sintering method, a two-step sintering method and a rate controlled two-step sintering method. The permittivity of the ceramics was increased with decreasing grain size to 1.1 μm on average. However, the permittivity of the ceramics was decreased when the grain size was below 1 μm. The field emission scanning electron microscope (FE-SEM) observations revealed that the 90° domain width decreased with decreasing the grain size. By ultrawide range dielectric spectra from kHz to THz range of the BaTiO3 ceramics, the domain contribution to the permittivity was investigated. For the BaTiO3 ceramics with grain sizes over 1 μm, the dipole polarizability and the ionic polarizability were enhanced by high domain-wall density. In contrast, for the BaTiO 3 ceramics with grain sizes below 1 μm, these polarizabilities were weakened.

本文言語English
ホスト出版物のタイトルElectroceramics in Japan XIII
出版社Trans Tech Publications Ltd
ページ27-30
ページ数4
ISBN(印刷版)9780878492640
DOI
出版ステータスPublished - 2010
外部発表はい

出版物シリーズ

名前Key Engineering Materials
445
ISSN(印刷版)1013-9826
ISSN(電子版)1662-9795

ASJC Scopus subject areas

  • 材料科学一般
  • 材料力学
  • 機械工学

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