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Jpn. J. Appl. Phys. 46 (2007) pp. 7044-7047  |Previous Article| |Next Article|  |Table of Contents|
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Domain Properties of High-Performance Barium Titanate Ceramics

Hirofumi Takahashi, Yoshiki Numamoto, Junji Tani1, and Sadahiro Tsurekawa2

Fuji Ceramics Corporation, 2320-11 Yamamiya, Fujinomiya, Shizuoka 418-0111, Japan
1Institute of Fluid Science, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
2The Faculty of Engineering, Kumamoto University, 2-39-1 Kurokami, Kumamoto 960-8555, Japan

(Received June 5, 2007; accepted June 13, 2007; published online October 22, 2007)

It has been known that barium titanate (BaTiO3) causes abnormal grain growth during conventional sintering utilizing resistance heating. The grain growth of barium titanate induced using by a hydrothermal synthesis method is controlled using microwave sintering having effects on internal overheating and rapid sintering and relationships between domain size and the piezoelectric constant d33 are studied. The domain size of a sample having a grain size of 2.5 µm was 76 nm and the d33 was 350 pC/N; however, the domain size of a 10 µm sample was 156 nm and the d33 was 300 pC/N. Furthermore, with the sample having a higher d33, the continuity of the domain structure across grain boundaries was confirmed.

KEYWORDS: BaTiO3 ceramics, hydrothermal synthesis, microwave sintering, piezoelectric constant (d33), domain size, continuity of domain structure, grain boundary
URL: http://jjap.ipap.jp/link?JJAP/46/7044/
DOI: 10.1143/JJAP.46.7044


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