首页|Fabrication and Microstructure of Grain-Oriented (Bi_(1/2)K_(1/2))TiO_3 Ceramics

Fabrication and Microstructure of Grain-Oriented (Bi_(1/2)K_(1/2))TiO_3 Ceramics

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  • Trans Tech Publications Ltd
Grain-oriented (Bi_(1/2)K_(1/2))TiO_3 (BKT) ceramics were prepared by the reactive templated grain growth (RTGG) method, and a hot-pressing (HP) method was modified on the basis of the RTGG method to obtain dense ceramics. The BKT ceramic sintered at 1060℃ showed a single-phase perovskite structure. The grain-oriented BKT prepared by the HP method exhibited a relatively high orientation factor F of 0.82 and a high density ratio of 99%. SEM micrographs of the HP-grain-oriented BKT indicated a textured and poreless microstructure. On the basis of the density ratio of 87% for the grain-oriented BKT without HP, the HP method was considered very effective for improving the density ratio even for the RTGG sample. In addition, the resistivity of the HP-grain-oriented BKT was 1.73 × 10~(13) Ω·cm.

bismuth potassium titanatereactive templated grain growth methodgrain orientationhot-pressing methodtextured microstructure

Masahiro Saitoh、Yuji Hiruma、Hajime Nagata、Tadashi Takenaka

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Faculty of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan

2010

10.4028/www.scientific.net/KEM.445.15

Key engineering materials

Key engineering materials

ISSN：1013-9826
年,卷(期)：2010.445
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