BiFeO_3改性BPCTZ低铅陶瓷介电和压电性能  

Dielectric and piezoelectric properties of BiFeO_3-modified BPCTZ lead-reduced ceramics

作　　者：刘勇[1] 刘心宇[1,2] 袁昌来[1] 蒙柳方 

机构地区：[1]桂林电子科技大学材料科学与工程学院,广西桂林541004 [2]中南大学材料科学与工程学院,湖南长沙410083

出　　处：《电子元件与材料》2015年第5期8-11,共4页Electronic Components And Materials

基　　金：国家自然科学基金资助项目(No.11464006);广西自然科学基金资助项目(No.2014GXNSFBA118254)

摘　　要：采用固相合成法制备了(1-x)(Ba0.89Pb0.1Ca0.01)(Ti0.99Zr0.01)O3-xBiFeO3(BPCTZ-BF,0≤x≤0.01)压电陶瓷,研究了BiFeO3对BPCTZ陶瓷晶体结构,介电和压电性能的影响。XRD结果表明Bi3+和Fe3+均进入BPCTZ晶格中,形成了具有纯钙钛矿结构的固溶体。随着BiFeO3含量的增加,居里温度(tC)向高温方向移动,当BiFeO3含量为x=0.004时,陶瓷样品的居里温度达到最大值178℃。在x=0.002时,该体系陶瓷具有最佳的压电性能:压电常数d33=144 pC/N,平面机电耦合系数k P=0.242,机械品质因数Qm=184。（1-χ）（Ba0.89Pb0.1Ca0.01）（Ti0.99Zr0.01）O3-xBiFeO3 （BPCTZ-BF, 0 ≤ x ≤ 0.01） lead-reduced ceramics were prepared by the conventional solid-state reaction method. The effects of BiFeO3 doping on the crystal structures, dielectric and piezoelectric properties of the ceramics were studied. The XRD results show that Bi3＋ and Fe3＋ diffuse into the BPCTZ lattices to form a new solid solution with a pure perovskite structure. The Curie temperature （tc） increases with increasing BiFeO3 content, and it reaches the maximum value of 178 ℃ at x=0.004. The optimum piezoelectric properties ofd33=144 pC/N, kv=0.242 and Qm=184 are obtained at x=0.002.

关 键 词：低铅 BIFEO3 BPCTZ 介电性能 居里温度 压电性能 

分 类 号：TM282[一般工业技术—材料科学与工程]