FERROELECTRIC DOMAIN-STRUCTURE OF LANTHANUM-MODIFIED LEAD TITANATE CERAMICS

被引：39
作者：
DEMCZYK, BG
RAI, RS
THOMAS, G
机构：
[1] UNIV CALIF BERKELEY LAWRENCE BERKELEY LAB,DEPT MAT SCI & MINERAL ENGN,BERKELEY,CA 94720
[2] UNIV CALIF BERKELEY LAWRENCE BERKELEY LAB,DIV MAT & CHEM SCI,BERKELEY,CA 94720
来源：
JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1990年 / 73卷 / 03期
关键词：
ceramics; domains; electrons; ferroelectrics; microscopy;
D O I：
10.1111/j.1151-2916.1990.tb06561.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：
The ferroelectric domain configurations in lanthanummodified lead titanate ceramics have been studied by transmission electron microscopy in conventional, analytical, and high‐resolution modes. Results indicate a preponderance of (101), twin‐related 90° domains of equilibrium width 50 to 100 nm. These values are consistent with those derived from consideration of elastic strain energy. Below a critical grain size of approximately 0.3 μm, single‐domain grains are found. A domain wall energy of 1 mJ/m2 was calculated based on this observation. Within such twins are occasionally found ordered domains, displaying little or no misorientation with respect to one another. In addition, (001), 180° domains were observed. Copyright © 1990, Wiley Blackwell. All rights reserved
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页码：615 / 620
页数：6
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