0.6PMnS-0.4PZN压电陶瓷的性能及相变特点  

Property and Phase Transition Character of the 0.6PMnS-0.4PZN Ceramics

作　　者：周静[1] 孙华君[1] 陈文[1] 

机构地区：[1]武汉理工大学材料科学与工程学院,湖北武汉430070

出　　处：《压电与声光》2007年第3期308-310,314,共4页Piezoelectrics & Acoustooptics

基　　金：国家自然科学基金资助项目(50402014);武汉市青年科技晨光计划资助项目(20035002016-10)

摘　　要：研究了0.6PMnS-0.4PZN压电陶瓷的性能及相变特征,分析了Ba2+、Sr2+取代对材料性能及相变特性的影响。结果表明,0.6PMnS-0.4PZN陶瓷具有弥散性相变特点,在相变过程中存在明显的介电热滞。Ba2+、Sr2+取代使相变温度降低。Ba2+取代使相变弥散性增强,介电热滞增加;Sr2+取代使原胞间的相互作用增强,介电热滞减小,利于铁电相的稳定,有利于材料性能的提高。0.6PMnS-0.4PZN在150℃以下具有较好的谐振频率和铁电性能温度稳定性。The phase transition character of the 0. 6PMnS-0. 4PZN quaternary system piezoelectric ceramics were studied, and the influence of the Ba^2＋ , Sr^2＋ substitute on the phase transition of the system ceramics were also analyzed. The results showed that the 0.6PMnS-0.4PZN ceramics had disperse phase transition character. The die- lectric properties were found with obvious temperature hysteresis during the phase transition. Ba^2＋ , Sr^2＋ substitute decreased the temperature of phase transition. Ba^2＋ substitute increased the diffusion of phase transition and temper- ature hysteresis; while Sr^2＋ substitute decreased the temperature hysteresis, by the reasons of Sr^2＋ substitute enhanced the interaction of unit cells, in favor of the stability of ferroelectric phase and the improvement of piezoelectric properties. 0.6PMnS-0.4PZN ceramics had better resonance frequency and temperature stability of ferroelectric properties under 150 ℃.

关 键 词：0.6PMnS-0.4PZN 弥散相变 Ba2+、Sr2+取代 压电性能 

分 类 号：TM22[一般工业技术—材料科学与工程]