Size effect and domain-wall contribution of barium titanate ceramics

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

Research output: Contribution to journalConference article

15 Citations (Scopus)

Abstract

Barium titanate (BaTiO3) ceramics with various grain sizes from 0.7 to 13 μm were prepared by a conventional sintering method and a two-step sintering method. The permittivity of the BaTiO3 ceramics with an average grain size of 1.1 μm exhibited a maximum around 8,000. By ultrawide range dielectric spectroscopy, the domain-wall contribution to the permittivity was investigated. For the BaTiO3 ceramics with grain sizes over 1 μm, the dipole and ionic polarizabilities were enhanced by the high domain density. In contrast, for the BaTiO3 ceramics with grain sizes below 1 μm, these polarizabilities were weakened.

Original languageEnglish
Pages (from-to)29-36
Number of pages8
JournalFerroelectrics
Volume402
Issue number1
DOIs
Publication statusPublished - Dec 1 2010
Externally publishedYes
Event12th International Meeting on Ferroelectricity, IMF-12 and the 18th IEEE International Symposium on Applications of Ferroelectrics, ISAF-18 - Xi'an, China
Duration: Aug 23 2009Aug 27 2009

Keywords

  • Barium titanate
  • domain wall contribution
  • size effect
  • ultrawide range dielectric spectroscopy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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