高居里温度铁电单晶PIN-PT的机电性能  

Electromechanical Properties of Ferroelectric Single Crystal PIN-PT with High Curie Temperature

作　　者：刘曼曼 汪跃群 熊俊杰 张文杰 孔舒燕 杨晓明 王祖建[1] 龙西法[1] 何超 LIU Manman;WANG Yuequn;XIONG Junjie;ZHANG Wenjie;KONG Shuyan;YANG Xiaoming;WANG Zujian;LONG Xifa;HE Chao(Fujian Institute of Research on the Structure of Matter, Chinese Academy of Science, Fuzhou 350002, China;Hangzhou Applied Acoustics Research Institute, Hangzhou 310023, China)

机构地区：[1]中国科学院福建物质结构研究所,福州350002 [2]中国船舶集团第七一五研究所,杭州310023

出　　处：《人工晶体学报》2022年第4期579-586,共8页Journal of Synthetic Crystals

基　　金：中国科学院重点部署项目(ZDRW-CN-2021-3);福建省工业引导项目(2020H0038)。

摘　　要：弛豫铁电单晶Pb(In_(1/2)Nb_(1/2))O_(3)-PbTiO_(3)(PIN-PT)相较于常用的Pb(Mg_(1/3)Nb_(2/3))O_(3)-PbTiO_(3)(PMN-PT)具有更高的居里温度,在高稳定性、高性能的传感器、换能器方面具有应用前景。本工作采用谐振法研究了[001]方向极化的0.66PIN-0.34PT铁电单晶的全矩阵机电性能参数。0.66PIN-0.34PT单晶的三方-四方相变温度(TRT)约为160℃,居里温度(TC)约为260℃,室温压电系数d_(33)、d_(31)、d_(15)分别为1340 pC/N、-780 pC/N、321 pC/N,介电常数εT33、εS33、εT11、εS11分别为2700、905、2210、1927,机电耦合系数k33、k31、k15、kt分别为87%、58%、38%、61%。其纵向压电常数(d33)和纵向机电耦合系数(k33)小于PMN-PT单晶,但是横向压电性能(d31)和剪切压电性能(d15)都略高于PMN-PT单晶。另外,研究了机电耦合性能随温度的变化趋势,发现0.66PIN-0.34PT单晶在150℃以下有较好的温度稳定性。Relaxor ferroelectric single crystal Pb(In_(1/2)Nb_(1/2))O_(3)-PbTiO_(3)(PIN-PT) has a higher Curie temperature than Pb(Mg_(1/3)Nb_(2/3))O_(3)-PbTiO_(3)(PMN-PT),which has a prospect in the application of sensors and transducers requiring high stability and high performance.In this work,the full matrix mechanical and electrical properties of[001]-poled 0.66PIN-0.34PT ferroelectric single crystal were studied by resonance method.The rhombohedral-tetragonal transformation temperature(TRT)and Curie temperature(TC)of 0.66PIN-0.34PT single crystal are 160℃and 260℃,respectively.The room temperature piezoelectric coefficients d33,d31 and d15 of 0.66PIN-0.34PT ferroelectric single crystal are 1340 pC/N,-780 pC/N and 321 pC/N,respectively.The dielectric constantsεT33,εS33,εT11,εS11 are 2700,905,2210,1927,respectively.The electromechanical coupling coefficients k33,k31,k15,kt are 87%,58%,38%,61%,respectively.The value of piezoelectric constant(d33)and electromechanical coupling coefficient(k33)of 0.66PIN-0.34PT single crystal are smaller than those of PMN-PT single crystal,but the transverse piezoelectric properties(d31)and shear piezoelectric properties(d15)are slightly higher than those of PMN-PT single crystal.In addition,the trend of variation in electromechanical coupling performance was studied,and it is found that 0.66PIN-0.34PT single crystal has good temperature stability below 150℃.

关 键 词：PIN-PT 弛豫铁电单晶 全矩阵参数 压电性能 机电性能 传感器 

分 类 号：TM22+1[一般工业技术—材料科学与工程] O782[电气工程—电工理论与新技术]