交流测试电场对PMZNT弛豫铁电陶瓷介电性能的影响  

Effects of AC Measuring Field on the DielectricProperties of PMZNT Relaxor Ferroelectric Ceramics

作　　者：张勇[1] 王雨[1] 桂红[1] 桂治轮[1] 李龙土[1] 

机构地区：[1]清华大学材料科学与工程系

出　　处：《功能材料》1998年第4期370-371,347,共3页Journal of Functional Materials

摘　　要：考察了不同交流测试电场对ＰＭＮ－ＰＺＮ－ＰＴ系弛豫铁电陶瓷介电性能的影响。测试结果表明，交流测试电场的增大导致介电常数最大值对应的温度Ｔｍａｘ下降，同时介电常数在Ｔｍａｘ附近及低于Ｔｍａｘ温度以下增大。并应用冻结偶极子、慢偶极子的概念对实验结果进行了定性分析。In this paper, the effects of AC measuring field on the dielectric properties of the PMNPZNPT relaxor ferroelectric ceramics were investigated,.The results showed that the temperature of the dielectric maximum Tmax decreased and the dielectric constant increased at temperatures around and below Tmax as the measuring field increased. Based on the concept of “frozen dipole” and “slow dipole”, a qualitative interpretation was given.

关 键 词：铁电陶瓷 交流电场 PMZNT 介电性能 

分 类 号：TM28[一般工业技术—材料科学与工程] TQ174.75[电气工程—电工理论与新技术]