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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
<<Previous article Vol.120  No.1402 (June) (2012)   pp.217 - 223 Next article>>

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.


Keyword:
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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