Preparation of crystal-axis-oriented barium calcium titanate plate-like particles and its application to oriented ceramic

Xingang Kong, Yoshie Ishikawa, Kazunari Shinagawa, Qi Feng

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24 Citations (Scopus)

Abstract

A novel two-step process has been developed for the preparation of Ba 0.9Ca0.1TiO3 plate-like grains with [110]-crystal-axis-orientation. In the first step, plate-like particles of a layered titanate H1.07Ti1.73O4 are solvothermally treated in a Ba(OH)2-Ca(OH)2 mixed solution, and then in the second step, heat-treat the solvothermally treated sample to complete the formation reaction of Ba0.9Ca 0.1TiO3. The formation reaction and nanostructure of the Ba0.9Ca0.1TiO3 plate-like grains were characterized using X-ray diffraction, FE-SEM, TEM, and SEAD. The Ba 0.9Ca0.1TiO3 plate-like grains are constructed from spherical nanoparticles with particle size of about 10-20 nm. The spherical nanocrystals in each plate-like grain arrange in the same crystal-axis- orientation direction, which presented a diffraction pattern similar to the single crystal. The Ba0.9Ca0.1TiO3 plate-like grains were utilized to fabricate an oriented Ba0.9Ca 0.1TiO3 ceramic to demonstrate the potential application of the plate-like grains, and the [110]-oriented Ba0.9Ca 0.1TiO3 ceramic with a high degree orientation of F 110 = 76% and small grain size of about 1-2 μm was obtained.

Original languageEnglish
Pages (from-to)3716-3721
Number of pages6
JournalJournal of the American Ceramic Society
Volume94
Issue number11
DOIs
Publication statusPublished - Nov 1 2011
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

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