Journal of the Ceramic Society of Japan
Online ISSN : 1348-6535
Print ISSN : 1882-0743
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Effect of SrBi8Ti7O27 hetero-template on texture development in Bi4Ti3O12
Kenichi ONODERAToshio KIMURA
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2012 Volume 120 Issue 1402 Pages 217-223

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Abstract

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.

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© 2012 The Ceramic Society of Japan
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