Bi、Cu共掺杂钛酸钡基压电陶瓷的制备与研究  

Preparation and Study on BaTiO_3-based Lead-free Piezoelectric Ceramics with Cu and Bi Co-doping

作　　者：高云[1] 吴裕功[1] 邹亚囡[1] 王建刚[1] 

机构地区：[1]天津大学电子信息工程学院,天津300072

出　　处：《压电与声光》2013年第4期576-579,587,共5页Piezoelectrics & Acoustooptics

基　　金：天津市自然科学基金资助项目(09JCZDJC22500)

摘　　要：采用溶胶-凝胶自燃烧工艺成功制备出(Ba0.99Bi0.01)(Cu0.005Ti0.995)O3微细粉料,并烧结成瓷。利用X线衍射(XRD)和电镜扫描(SEM)分析了样品的物相及显微形貌,发现样品为四方钙钛矿结构,晶粒大小均匀。研究了不同烧结温度的(Ba0.99Bi0.01)(Cu0.005Ti0.995)O3陶瓷居里温度的变化、介电温谱、压电特性及其温度稳定性。实验表明,以Bi、Cu进行掺杂可降低钛酸钡的烧结温度,且有效改善了其电性能,居里温度从不掺杂时的120℃提高到155℃,温度1 240℃烧结样品表现出最佳的综合压电性,压电常数(d33)为80pC/N,机电耦合系数(kp)为12.6%,品质因数(Qm)为310,压电常数(d31)为-16.8pC/N,且其压电性的温度稳定性有了很大提高。The（Ba0.99Bi0.01）（Cu0.005Ti0.995）O3 fine powders were prepared by Sol-Gel self-ignition method and the ceramics were sintered.The phase and microstructure of the sample have been analyzed by XRD and SEM.The results demonstrate that（Ba0.99Bi0.01）（Cu0.005Ti0.995）O3 ceramics are tetragonal perovskite structure and the grain size is uniform.The Curie temperature variation,dielectric and piezoelectric properties,and the temperature stability of（Ba0.99Bi0.01）（Cu0.005Ti0.995）O3 ceramics have been investigated under different sintering temperature.The experimental results show that Bi and Cu co-doping can reduce the sintering temperature of BaTiO3 ceramic,improve the electrical performance and promote the TC from 120 ℃ to 155 ℃.The samples sintered at 1 240 ℃ exhibits optimum piezoelectric properties with the piezoelectric constant（d33） of 80 pC/N,electromechanical coupling factor（kp） of 12.6%,quality factor（Qm） of 310 and the piezoelectric constant（d31） of-16.8 pC/N,and the piezoelectric temperature stability has been greatly improved.

关 键 词：压电陶瓷 钛酸钡(BaTiO3) Cu、Bi掺杂 居里温度 压电性能 

分 类 号：TM223[一般工业技术—材料科学与工程]