Grain growth of BaTiO3

Grain growth of BaTiO3 was investigated and the results compared with those of high-temperature creep tests. The activation energy value of 720 plus or minus 70 kJ/mol, measured for coarse-grained BaTiO3 agreed well with the value of approximately equal to 800 kJ/mol determined in a higher-stress re...

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Bibliographic Details
Published in:Journal of materials science letters 1999-01, Vol.18 (2), p.163-165
Main Author: PARK, E. T
Format: Article
Language:English
Subjects:
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
Electrotechnical and electronic ceramics
Exact sciences and technology
Technical ceramics
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Summary:Grain growth of BaTiO3 was investigated and the results compared with those of high-temperature creep tests. The activation energy value of 720 plus or minus 70 kJ/mol, measured for coarse-grained BaTiO3 agreed well with the value of approximately equal to 800 kJ/mol determined in a higher-stress region in superplastic flow of fine-grained BaTiO3. However, creep for BaTiO3 single crystals oriented to glide on 001 planes showed an activation energy of 469 plus or minus 27 kJ/mol. The activation energy for creep shows a disparity among the tests. Therefore, grain-growth studies can help to clarify the interpretation of creep results. 21 refs.
ISSN:0261-8028
DOI:10.1023/A:1006682906362