掺铑BaTiO_3单晶场致应变特性的研究  

Investigation on electro-strain effect in Rh-doped BaTiO_3 single crystals

作　　者：周丹[1] 林迪[1] 贺天厚[1] 冯祖勇[1] 徐海清[1] 罗豪甦[1] 

机构地区：[1]中国科学院上海硅酸盐研究所高性能陶瓷和超微结构国家重点实验室

出　　处：《物理学报》2005年第9期4053-4057,共5页Acta Physica Sinica

基　　金：国家高技术研究发展计划(批准号:2002AA325130);国家自然科学基金(批准号:50272075和50432030)资助的课题.~~

摘　　要：系统地研究了掺铑的BaTiO3单晶在老化后的场致应变性能.研究发现,晶体的场致应变随老化时间的增加而增大,在老化27天后,在300Vmm的电场下,其双向场致应变可达1.11%;在较小的测试频率下(0.01Hz)也可得到0.95%的可逆的巨大的单向场致应变,在低频范围内,晶体的单向场致应变随测试频率增大而减小;研究晶体老化后的电滞回线,发现其形状类似于蜂腰磁滞回线.实验结果表明,对BaTiO3单晶掺杂铑元素可以大大改善其电致伸缩性能,可能产生新的在超大应变及非线性驱动器中的应用.The electric-field-induced strain in Rh-doped BaTiO3 single crystals increases with increasing ageing time at 80℃. After 27 days＇ ageing, the strain can reach 1.11% under bipolar field cycling conditions. However, the strain under monopolar field cycles is strongly dependent on the drive frequency and reaches as high as 0.95 % at frequency of 0.01 Hz. The hysteresis loop （ P-E curve） of the aged sample is similar to a wasp-waisted hysteresis loop. Ageing can significantly improve the electro-strain effect in the Rh-doped BaTiO3 crystal and make the BaTiO3 crystal a promising and lead-free material for novel applications in ultra-large strain and nonlinear actuators.

关 键 词：BATIO3 单晶 掺铑 场致应变 老化 应变性能 老化时间 晶场 铑 电致伸缩性能 测试频率 电滞回线 磁滞回线 

分 类 号：TB39[一般工业技术—材料科学与工程]