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JMR Abstracts: September 1998
Article
Correlation between anatase-to-rutile
transformation and grain growth in nanocrystalline titania
powdersX-Z. Ding, X-H. Liu
(Chinese Academy of Sciences)
During the
heat-treatment of an anatase nanocrystalline powder at a high temperature,
the two processes of anatase-to-rutile (A<>Æ
R) transformation and grain growth would occur
simultaneously and affect each other. With decrease of the original
anatase grain size, the A<>ÆR
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<>ÆR
transformation, which can be ascribed to the higher atomic mobility
because of the bond breakage during the transformation.
Order No.:
JA809-029 © 1998 MRS
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