【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。更多还原

【Abstract】 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.更多还原