Improvement of fatigue resistance for multilayer lead zirconate titanate (PZT)-based ceramic actuators by external mechanical loads

被引：6

作者：

Yang, Gang ^{[1
]}

Yue, Zhenxing ^{[1
]}

Ji, Ye ^{[1
]}

Chu, Xiangcheng ^{[1
]}

Li, Longtu ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China

来源：

JOURNAL OF APPLIED PHYSICS | 2008年 / 104卷 / 12期

关键词：

ceramics; dielectric polarisation; electric domains; fatigue; lead compounds; multilayers; piezoelectric actuators;

D O I：

10.1063/1.3042226

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The influence of external compressive loads, applied along a direction perpendicular to polarization, on fatigue behaviors of multilayer lead zirconate titanate (PZT)-based ceramic actuators was investigated. Under no external mechanical load, a normal fatigue behavior was observed, demonstrating that both switching polarization (P-switching) and remnant polarization (P-r) progressively decreased with increasing switching cycles due to domain pinning by charge point defects. However, an anomalous enhancement in both switching and remnant polarizations was observed upon application of the external compressive loads. After 5x10(6) cycles of polarization switching, P-switching and P-r increase by about 13% and 6% at 40 MPa, respectively, while P-switching and P-r increase by about 11% and 21% at 60 MPa, respectively. The improvement of fatigue resistance can be attributed to non-180 degrees domain switching and suppression of microcracking, triggered by external mechanical loads.

引用

页数：3

共 16 条

[1] Improving fatigue resistance of Pb(Zr,Ti)O3 thin films by using PbZrO3 buffer layers [J].