Preparation and investigation of hexagonal-tetragonal BaTiO3 powders

Hari Shankar Mallik, Ichiro Fujii, Yoshio Matsui, Gopal Prasad Khanal, Sangwook Kim, Shintaro Ueno, Tohru S. Suzuki, Satoshi Wada

研究成果: Article査読

1 被引用数 (Scopus)

抄録

Hexagonal-tetragonal co-existing barium titanate powders were prepared by reducing commercial barium titanate powders with their particle size of about 100 nm in a hydrogen atmosphere for 1 h at several temperatures, and the microstructures were observed. It was found that the hexagonal-tetragonal barium titanate powder had a co-existing hexagonal and tetragonal phase in a particle rather than a mixture of two phases in the powder. The hexagonal contents of about 0, 25, 50, 70, 85, and 100 wt % were obtained at temperatures of 1310, 1315, 1320, 1324, 1330, and 1333 °C, respectively. The hexagonal phase was returned to the tetragonal phase by annealing at 1200 °C in air. A model for the mechanism of a complete transformation of barium titanate polymorph from tetragonal/cubic to hexagonal phases is proposed.

本文言語English
ページ(範囲)91-96
ページ数6
ジャーナルJournal of the Ceramic Society of Japan
129
2
DOI
出版ステータスPublished - 2021 2
外部発表はい

ASJC Scopus subject areas

  • セラミックおよび複合材料
  • 化学 (全般)
  • 凝縮系物理学
  • 材料化学

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