PZT压电陶瓷的强场效应研究  

Study on the High Electrical Field Effect of PZT Piezoelectric Ceramic

作　　者：陈亚波[1] 张洋洋[2] 刘岚[2] 易飞[2] 刘耀平[2] 

机构地区：[1]华中科技大学电气与电子工程学院,湖北武汉430074 [2]华中科技大学电子科学与技术系,湖北武汉430074

出　　处：《压电与声光》2009年第1期57-59,共3页Piezoelectrics & Acoustooptics

基　　金：新世纪优秀人才支持计划基金资助项目(NCET-04-0703);湖北省自然科学基金资助项目(2005ABA298)

摘　　要：实验选取一种性能较好的二元系锆钛酸铅(PZT)压电陶瓷配方,通过测试PZT陶瓷样品在强场下的介电性能表明,随着外加电场强度的增大,样品介温曲线的斜率变小;材料的介电损耗随着外加电场的增大而增大,当外加电场从0升至400 V/mm时,介电损耗从0.16%增至0.38%,损耗仍在较小范围内,可见本材料较适合作为大功率压电材料在强场下应用。对其强场效应及损耗机理进行了初步探讨。A kind of binary system piezoelectric ceramic with good properties was selected to measure its dielec- tric proprties of the PZT samples at high electrical field. The experimental results showed that with the increace of electrical field, the slope of dielectric constant-temperature curve became smaller, implying that the temperature sta- bility of dielectric constant became better. The dielectric loss increaseed when the electrical field increased, and it changed from 0.16~ to 0.38% as the electrical field changed from 0 to 400 V/mm. Although dielectric loss became bigger, it was still a small value. So the material discussed in this paper was suitable for the application of high- power piezoelectric ceramics at high electrical field. The high electrical field effect and dielectric loss mechanics were preliminarily discussed in this paper.

关 键 词：锆钛酸铅(PZT) 低损耗 强场效应 松弛极化 

分 类 号：TM282[一般工业技术—材料科学与工程]