Dielectric properties of barium titanate ceramics with nano-sized domain

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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

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.

Original languageEnglish
Title of host publicationElectroceramics in Japan XIII
PublisherTrans Tech Publications Ltd
Pages27-30
Number of pages4
ISBN (Print)9780878492640
DOIs
Publication statusPublished - Jan 1 2010

Publication series

NameKey Engineering Materials
Volume445
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795

Keywords

  • Barium titanate
  • Dielectric property
  • Domain
  • Polarization
  • Size effect

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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  • Cite this

    Kigoshi, Y., Hatta, S., Teranishi, T., Hoshina, T., Takeda, H., Sakurai, O., & Tsurumi, T. (2010). Dielectric properties of barium titanate ceramics with nano-sized domain. In Electroceramics in Japan XIII (pp. 27-30). (Key Engineering Materials; Vol. 445). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/KEM.445.27