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Evolution of crystalline zirconia structure in heat-treated ceria stabilized zirconia gels

Published online by Cambridge University Press:  31 January 2011

V.S. Nagarajan  and
K.J. Rao
V.S. Nagarajan
Affiliation:
Materials Research Centre, Indian Institute of Science, Bangalore-560 012, India
K.J. Rao*
Affiliation:
Materials Research Centre, Indian Institute of Science, Bangalore-560 012, India
*
a)Address correspondence to this author.
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Abstract

Transformation characteristics of CeO2 stabilized ZrO2 gels have been studied during heating in the temperature region 1273–1473 K. The nature of the major phase present changes drastically in this temperature region. The crystallite sizes of tetragonal and monoclinic ZrO2 crystallites have been calculated by x-ray line broadening. The change in the nature of the major phase observed during heat treatment seems to be related to the presence of a barrier for transformation from a metastable to a stable regime, which in turn appears to be related to the diffusion barriers of Ce4+ in ZrO2.

Type
Articles
Information
Journal of Materials Research , Volume 6 , Issue 12 , December 1991 , pp. 2688 - 2693
Copyright
Copyright © Materials Research Society 1991

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