Fabrication of (111) Oriented BaTiO3 Bulk Ceramic by Reactive Templated Grain Growth Method.

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  • SUGAWARA Tsutomu
    School of Integrated Design Engineering, Graduate School of Science and Technology, Keio University
  • NOMURA Yoko
    School of Integrated Design Engineering, Graduate School of Science and Technology, Keio University
  • KIMURA Toshio
    School of Integrated Design Engineering, Graduate School of Science and Technology, Keio University
  • TANI Toshihiko
    Toyota Central Research and Development Laboratories, Inc.

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  • 反応性テンプレート粒成長法による〈111〉配向性BaTiO<sub>3</sub>バルクセラミックの製造

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Abstract

A polycrystalline BaTiO3 bulk ceramic with a preferred ‹111› orientation was fabricated by the reactive templated grain growth method. A green compact was made by tape-casting of slurry containing plate-like Ba5Ti17O40 template particles and BaCO3 powder. Single phase BaTiO3 was obtained by calcining the green compact at 1000°C. The calcined compacts were sintered between 1250 and 1400°C. The degree of orientation increased with an increase in the sintering temperature. Growth of ‹111›-oriented BaTiO3 grains originated from the Ba6Ti17O40 particles is responsible for the increase in the degree of orientation.

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