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Correlations between sintering conditions and microstructure in ceramics of composition Li0.80Mg0.20 (Ta0.80Ti0.20)O3

Published online by Cambridge University Press:  31 January 2011

J. P. Bonnet ,
J. Ravez ,
Joo GiTae  and
P. Hagenmuller
J. P. Bonnet
Affiliation:
Laboratoire de Chimie du Solide du CNRS, Universite'de Bordeaux I,351, Cours de la Libération 33405 Talence, France
J. Ravez
Affiliation:
Laboratoire de Chimie du Solide du CNRS, Universite'de Bordeaux I,351, Cours de la Libération 33405 Talence, France
Joo GiTae*
Affiliation:
Laboratoire de Chimie du Solide du CNRS, Universite'de Bordeaux I,351, Cours de la Libération 33405 Talence, France
P. Hagenmuller
Affiliation:
Laboratoire de Chimie du Solide du CNRS, Universite'de Bordeaux I,351, Cours de la Libération 33405 Talence, France
*
a)Materials Science Department, Korea Advanced Institute of Science and Technology, P. O. Box 131, Dong Dae Mun, Seoul, Korea
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Abstract

Two quite different types of microstructures have been detected for MgTiO3-enriched LiTaO3 ceramics corresponding either to small size grains and open porosity or to large size grains with closed porosity and appearance of microcracks. The first structure appears in short sintering processes at relatively low temperature. The textural change is explained by transitory formation of a grain boundary phase that leads to quick coalescence of the small grains.

Type
Articles
Information
Journal of Materials Research , Volume 3 , Issue 2 , April 1988 , pp. 387 - 391
Copyright
Copyright © Materials Research Society 1988

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