Degradation and cracking behavior of 0.2(PbMg1/3Nb2/3O3)-0.8(PbZr0.475Ti0.525O3) multilayer ceramic actuators

被引：18

作者：

Koh, JH ^{[1
]}

Jeong, SJ ^{[1
]}

Ha, MS ^{[1
]}

Song, JS ^{[1
]}

机构：

[1] Korea Electrotechnol Res Inst, Elect & Magnet Devices Res Grp, Chang Won, South Korea

来源：

SENSORS AND ACTUATORS A-PHYSICAL | 2004年 / 112卷 / 2-3期

关键词：

multilayer ceramic actuator (MCA); PZT; aging; tape casting; piezoelectric constant; electromechanical coupling coefficient;

D O I：

10.1016/j.sna.2004.01.001

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Aging behavior of 0.2(PbMg1/3Nb2/3O3)-0.8(PbZr0.475Ti0.525O3) multi layer ceramic actuators has been investigated by applying both triangular wave function for unpoled actuator and unipolar wave function for poled actuator. After 8.7 x 10(7) cycles of triangular wave function, multilayer ceramic actuator (MCA) had distorted shape of polarization-electric field (P-E) hysteresis loops. Effective electromechanical coupling coefficient k(eff) was Calculated by considering resonant frequency and anti resonant frequency. Pseudo-peizoelectric constant d(33) was also estimated through the strain versus electric field characteristics. From the SEM analysis, crack growth of multilayer ceramic actuator was clearly observed along to the boundary between electrode and inactive region. The main reason for destruction of 0.2(PbM1/3Nb2/3O3)-0.8(PbZr0.475Ti0.525O3) multilayer ceramic actuators was mechanical tensile stress come from both actuation of d(33) mode and motion of Poisson ratio. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：232 / 236

页数：5

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