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Ferroelectrics Volume 197, 1997 - Issue 1
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Original Articles

Nonlinearity and slow relaxation effects of piezoelectric ceramics

Zhou Zhenhong Dielectric Physics Research Centre, Guangdong University of Technology, Guangzhou 510090, P. R., China
,
Fan Yangcai Dielectric Physics Research Centre, Guangdong University of Technology, Guangzhou 510090, P. R., China
,
Li Xiaoling Dielectric Physics Research Centre, Guangdong University of Technology, Guangzhou 510090, P. R., China
,
Chen Rong Dielectric Physics Research Centre, Guangdong University of Technology, Guangzhou 510090, P. R., China
&
Li Jingde Physics Department, Zhongshan University, Guangzhou, 510275, P. R., China
Pages 11-14 | Received 05 Oct 1995, Published online: 07 Mar 2011
 
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Abstract

Using an interferometer the strain S of doped PZT ceramics in an applied field E is measured. When E is an alternating field, an asymmetrical piezoelectric loop is observed. The piezoelectric response has a fast component and a slow one. The response is nonlinear with a positive quadtic term, which is different from electrostriction effect. The stochastic and free relaxation effect are observed for a same sample.

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