BF-PT-BZT三元系高温压电陶瓷的介电压电温度稳定性  

Dielectric and Piezoelectric Temperature Stability of BF-PT-BZT Ternary High Temperature Piezoelectric Ceramics

作　　者：杜嘉诚 田聪聪 王永晨 陈建国[1] 赵慧[2] 王艳[2] 程晋荣[1] DU Jiacheng;TIAN Congcong;WANG Yongchen;CHEN Jianguo;ZHAO Hui;WNAG Yan;CHENG Jinrong(School of Materials Science and Engineering,Shanghai University,Shanghai 200444,China;National Key Lab.of Science and Technology on Underwater Acoustic Antagonizing,Shanghai Ship Electronic Equipment Research Institute,Shanghai 201108,China)

机构地区：[1]上海大学材料科学与工程学院,上海200444 [2]上海船舶电子设备研究所水声对抗技术全国重点实验室,上海201108

出　　处：《压电与声光》2024年第1期32-36,41,共6页Piezoelectrics & Acoustooptics

基　　金：水声对抗技术重点实验室开放基金资助项目(JCKY2020207CH02);上海市自然科学基金原创探索基金资助项目(22ZR1481100);青年科学家基金;国家自然科学基金资助项目(12204300,51872180)。

摘　　要：采用传统固相反应法制备0.54BiFeO_(3)-0.33PbTiO_(3)-0.13Ba(Zr_(x)Ti_(1-x))O_(3)(BF-0.33PT-0.13Ba(Zr_(x)Ti_(1-x)),0.4≤x≤0.8)三元系压电陶瓷,研究了Zr含量(x)对陶瓷的微观结构以及介电、铁电和压电性能的影响。X线衍射(XRD)结果表明,BF-0.33PT-0.13Ba(Zr_(x)Ti_(1-x))三元系陶瓷为单一钙钛矿结构,当0.4≤x≤0.7时,陶瓷相结构为三方-四方相共存;当x=0.8时,陶瓷为三方相结构。扫描电子显微镜(SEM)结果表明,随着Zr含量的增加,陶瓷晶粒尺寸逐渐增加。在25~400℃时,陶瓷的压电常数d 33的波动小于±6%。当x=0.7时,BF-0.33PT-0.13Ba(Zr_(x)Ti_(1-x))具有最优异的综合性能,其介电常数εr、居里温度T_(C)、压电常数d_(33)分别为1194(1 kHz)、438℃和330 pC/N,在25~300℃时,陶瓷的电容温度系数和压电常数变化率分别为16%和8%。结果表明,BF-0.33PT-0.13Ba(Zr_(0.7)Ti_(0.3))陶瓷在高温压电器件中具有较广的应用前景。The ternary piezoelectric ceramics of 0.54BiFeO_(3)-0.33PbTiO_(3)-0.13Ba(Zr_(x)Ti_(1-x))O_(3)(BF-0.33PT-0.13 Ba(Zr_(x)Ti_(1-x)),0.4≤x≤0.8)were prepared by traditional solid-state reaction method and the effects of Zr content(x)on microstructure,dielectric,ferroelectric and piezoelectric properties of ceramics were investigated.X-ray diffraction results show that BF-0.33PT-0.13Ba(Zr_(x)Ti_(1-x))ternary ceramics display a single perovskite structure.When 0.4≤x≤0.7,the ceramic phase structure is tetragonal phase and rhombohedral phase coexist.When x=0.8,the ceramic has a triangular phase structure.Scanning electron microscopy(SEM)images show that the grain size increases with the increase of Zr content.The fluctuation of piezoelectric coefficient d_( 33) of ceramics is less than±6%at 25-400℃.When x=0.7,BF-0.33PT-0.13Ba(Zr_(x)Ti_(1-x))has the best comprehensive properties,and the dielectric constantεr,Curie temperature T_(C)and piezoelectric constant d 33 of the ceramics are 1194(1 kHz),438℃and 330 pC/N,respectively.The capacitance temperature coefficient and the change rate of piezoelectric constant d 33 are 16%and 8%at 25-300℃,respectively.These results indicate that BF-0.33PT-0.13Ba(Zr_(0.7)Ti_(0.3))ceramics have promising applications in high-temperature piezoelectric devices.

关 键 词：BF-PT-BZT三元系陶瓷 居里温度 介电常数 压电性能 温度稳定性 

分 类 号：TN384[电子电信—物理电子学] TM22[一般工业技术—材料科学与工程]