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Home  >  Journal list  >  Journal of the Ceramic Society of Japan  >  Vol.120  No.1402 (June) (2012)  >  pp.217-223

Journal of the Ceramic Society of Japan
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Effect of SrBi8Ti7O27 hetero-template on texture development in Bi4Ti3O12

Kenichi ONODERA1), Toshio KIMURA1)
1) Graduate School of Science and Technology, Keio University

The effect of hetero-template grains on texture development in Bi4Ti3O12 (BiT) was examined. The hetero-template was SrBi8Ti7O27 (S0.5BT) grains with a large platelike shape. Texture developed in pure BiT made by solid-state reaction without template grains. The origin of texture development was attributed to the growth of small platelike grains with an aspect ratio of approximately 3 (homo-template) present in the BiT powder. The hetero-template grains added to the BiT powder promoted texture development, and the degree of the promotion was dependent on the amount of hetero-template. When the concentration of hetero-template was 1 vol %, the hetero-template and homo-template acted as the origin of texture development. When the concentration was increased to 5 vol %, the orientation of grains was almost only caused by the hetero-template. When the concentration was further increased to 10 vol %, texture did not develop. SrTiO3 in the hetero-template dissolved in the BiT matrix grains, thus reducing the grain growth rate. These results indicate that grain growth is essential for texture development in BiT.

Texture development, Grain orientation, Templated grain growth, Hetero-template, Bismuth titanate

Received: December 06, 2011
Accepted: March 26, 2012 , Published online: June 01, 2012
Copyright © 2012 The Ceramic Society of Japan



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