Journal
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
Volume 93, Issue 9, Pages 2571-2573Publisher
WILEY-BLACKWELL
DOI: 10.1111/j.1551-2916.2010.03900.x
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Funding
- National Science Fund for Distinguished Young Scholars [50625204]
- National Natural Science Fund for Creative Research Groups [50921061]
- Ministry of Science and Technology of China [2009CB623301, 2006AA03Z428]
- Fund for Supervisor of Excellent PhD Thesis of Beijing [YB20081000302]
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An innovative method is presented to estimate the size effect on the ferroelectric phase transitions in the barium titanate ceramic system. The method is based on the phenomenological thermodynamic theory with additional stress led by surface bond contraction. Two symmetry-breaking factors are introduced to correct the stress. This method has enabled us to predict the changing trends in phase transitions and the critical grain size for the disappearance of ferroelectric phase, which is beyond the prediction of existing models.
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