Fractal analysis on domain related electric field induced acoustic emission in ferroelectric ceramics

被引：0
|
作者：
Aburatani, Hideaki [1 ]
Witham, John P. [1 ]
Uchino, Kenji [1 ]
机构：
[1] Pennsylvania State Univ, University Park, United States
来源：
Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes & Review Papers | 1998年 / 37卷 / 02期
关键词：
Theoretical; (THR); -; Experimental; (EXP);
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学科分类号：
摘要：
The electric field induced acoustic emission (AE) in ferroelectric ceramics under bipolar electric fields has been studied. From the AE event rate and the AE signal amplitude distribution, it is assumed that there are two origins of the field induced AE in the ferroelectric ceramics: domain reorientation related deformation and piezoelectric deformation without domain reorientation. The fractal dimension (m) in the field induced AE signal amplitude distribution of the ferroelectric ceramic is found to be m = 1 for the domain reorientation related deformation. The fractal dimension of m = 2.8 is observed for the piezoelectric deformation unrelated to domain reorientation after domain reorientation is completed. It is shown that the fractal dimension of the AE caused by the domain reorientation related deformation is lower than that of the AE generated by the piezoelectric deformation unrelated to domain reorientation at high electric fields.
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页码：602 / 605
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