MODEL FOR THE FERROELECTRIC TRANSITION IN NONSTOICHIOMETRIC LITHIUM-NIOBATE AND LITHIUM TANTALATE

被引：27
作者：
BIRNIE, DP
机构：
[1] Department of Materials Science and Engineering, University of Arizona, Tucson, Arizona
来源：
JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1991年 / 74卷 / 05期
关键词：
MODELS; FERROELECTRICS; TRANSITIONS; LITHIUM NIOBATE; TANTALATES;
D O I：
10.1111/j.1151-2916.1991.tb04332.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：
A model is developed for the ferroelectric-to-paraelectric phase transition in LiNbO3 and LiTaO3. The model is consistent with literature reports of nonstoichiometry, point defect formation, and phase transformation behavior. The model uses lithium Frenkel-defect-based order-disorder as the phase transformation mechanism. The phase transformation (Curie) temperature is predicted to decrease linearly with deviation from stoichiometry in agreement with experimental obsevations.
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收藏
页码：988 / 993
页数：6
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