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Correlation Between Anatase-to-rutile Transformation and Grain Growth in Nanocrystalline Titania Powders

Published online by Cambridge University Press:  31 January 2011

Xing-Zhao Ding  and
Xiang-Huai Liu
Xing-Zhao Ding
Affiliation:
Ion Beam Laboratory, Shanghai Institute of Metallurgy, Chinese Academy of Sciences, Shanghai 200050, People's Republic of China
Xiang-Huai Liu
Affiliation:
Ion Beam Laboratory, Shanghai Institute of Metallurgy, Chinese Academy of Sciences, Shanghai 200050, People's Republic of China
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Abstract

During the heat treatment of an anatase nanocrystalline powder at a high temperature, the two processes of anatase-to-rutile (A → R) transformation and grain growth would occur simultaneously and affect each other. With decrease of the original anatase grain size, the A → R transformation temperature range became extended on both sides, which may be partially attributed to the prevention effect of grain growth on this transformation. On the other hand, the grain growth process could be significantly enhanced by the A → R transformation, which can be ascribed to the higher atomic mobility because of the bond breakage during the transformation.

Type
Articles
Information
Journal of Materials Research , Volume 13 , Issue 9 , September 1998 , pp. 2556 - 2559
Copyright
Copyright © Materials Research Society 1998

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