A Phenomenological Model on Phase Transitions in Nanocrystalline Barium Titanate Ceramic

被引：24
|
作者：
Sun, Tieyu [1 ]
Wang, Xiaohui [1 ]
Wang, Han [1 ]
Zhang, Xiaoquan [1 ]
Cheng, Zhida [1 ]
Sun, Chang Q. [2 ]
Li, Longtu [1 ]
机构：
[1] Tsinghua Univ, State Key Lab New Ceram & Fine Proc, Dept Mat Sci & Engn, Beijing 100084, Peoples R China
[2] Nanyang Technol Univ, Sch Elect & Elect Engn, Singapore 639798, Singapore
来源：
JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2010年 / 93卷 / 09期
关键词：
SURFACE BOND CONTRACTION; GRAIN-SIZE; DIELECTRIC-PROPERTIES; FERROELECTRIC CERAMICS; BATIO3;
D O I：
10.1111/j.1551-2916.2010.03900.x
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
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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页码：2571 / 2573
页数：3
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