0.13BZT-xBS-(0.87-x)PT压电陶瓷的电学性能及其温度稳定性  

Electrical Properties and Their Temperature Stability of 01.3BZT-xBS-(08.7-x)PT Piezoelectric Ceramics

作　　者：张明志 王一平[1] 钱派 胡悫睿 王加康 杨颖[1] ZHANG Mingzhi;WANG Yiping;QIAN Pai;HU Querui;WANG Jiakang;YANG Ying(State Key Laboratory of Mechanics and Control of Mechanical Structures,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;College of Materials Science and Technology,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;Technology Center,CDGM Glass Co.,Ltd.,Chengdu 610100,China)

机构地区：[1]南京航空航天大学机械结构力学及控制国家重点实验室,南京210016 [2]南京航空航天大学材料科学与技术学院,南京210016 [3]成都光明光电股份有限公司技术中心,成都610100

出　　处：《机械工程材料》2023年第9期14-18,51,共6页Materials For Mechanical Engineering

基　　金：国家自然科学基金联合基金资助项目(U2037603)。

摘　　要：采用固相反应法制备了0.13Bi(Zn_(1/2)Ti_(1/2))O_(3)-xBiScO_(3)-(0.87-x)PbTiO_(3)[0.13BZT-xBS-(0.87-x)PT](0.28≤x≤0.36)压电陶瓷,研究了陶瓷的微观结构、电学性能及其温度稳定性。结果表明:随着x的增大,陶瓷由四方相转变为三方相结构,当x不低于0.34时,出现了Bi_(38)ZnO_(60)析出相;随着x的增大,陶瓷的剩余极化强度P_(r)、压电常数d_(33)、机电耦合系数k_(p)和相对介电常数ε_(r)均先增大后减小,居里温度T_(c)降低,当x为0.32时,陶瓷的综合电学性能最优,P_(r),d_(33),k_(p),ε_(r)最大,分别为31.5μC·cm^(-2),283 pC·N^(-1),0.37,1 840,T_(c)较高,为380℃。在室温至300℃的温度范围,当x为0.32时,d_(33)随温度的变化率几乎为0,此时陶瓷的压电性能对温度不敏感,具有良好的温度稳定性。0.13Bi(Zn_(1/2)Ti_(1/2))O_(3)-xBiScO_(3)-(0.87-x)PbTiO_(3) [0.13BZT-xBS-(0.87-x)PT](0.28≤x≤0.36) piezoelectric ceramics were prepared by solid-state reaction method,and the microstructure and electrical properties and their temperature stability of ceramics were studied.The results show that the ceramic structure transformed from tetragonal to rhombohedral phase with increasing x;when x was not smaller than 0.34,Bi_(38)ZnO_(60) precipitates appeared.With the increase of x,the remanent polarization P_r,the piezoelectric constant d_(33),the electromechanical coupling coefficient k_(p) and the relative dielectric constant ε_(r) of the ceramics all increased first and then decreased,and the Curie temperature T_(c) decreased.When x was 0.32,the comprehensive electrical properties of the ceramics was the best;the ceramics had the largest P_r,d_(33),k_(p) and ε_(r) of 31.5 μC·cm~(-2),283 pC· N~(-1),0.37,1 840,respectively,and relatively high T_(c) of 380 ℃.In the temperature range from room temperature to 300 ℃,when x was 0.32,the change rate of d_(33) with temperature was almost zero;at this time,the piezoelectric properties of the ceramics were not sensitive to temperature,and had good temperature stability.

关 键 词：BZT-BS-PT陶瓷 微观结构 电学性能 温度稳定性 

分 类 号：TM282[一般工业技术—材料科学与工程]