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Observation of Intergranular Films in BaB2O4-added BaTiO3 Ceramics

Published online by Cambridge University Press:  31 January 2011

Joon-Hyung Lee ,
Jeong-Joo Kim ,
Haifeng Wang  and
Sang-Hee Cho
Joon-Hyung Lee*
Affiliation:
Department of Inorganic Materials Engineering, Kyungpook National University, Taegu 702–701, Korea
Jeong-Joo Kim
Affiliation:
Department of Inorganic Materials Engineering, Kyungpook National University, Taegu 702–701, Korea
Haifeng Wang
Affiliation:
Department of Materials Science & Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
Sang-Hee Cho
Affiliation:
Department of Inorganic Materials Engineering, Kyungpook National University, Taegu 702–701, Korea
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Distribution characteristics of boundary phase in BaB2O4 added BaTiO3 ceramics were investigated with a focus on the curvature difference of solid–liquid interfaces at two-grain and triple junctions. High-resolution transmission electron microscopy revealed that the triple junction of solid grains showed the positive curvature of solid–liquid interface and consisted of the mixture of liquid phase and crystallized BaB2O4 phase. On the other hand, flat amorphous thin film of 2.5-nm thickness was observed at the two-grain junction. This kind of boundary phase distribution characteristic was explained by the solubility difference between two kinds of junctions of solid grains that had different curvature of solid–liquid interfaces.

Type
Articles
Information
Journal of Materials Research , Volume 15 , Issue 7 , July 2000 , pp. 1600 - 1604
Copyright
Copyright © Materials Research Society 2000

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