BaTiO_3掺杂对铌酸盐基无铅压电陶瓷性能的影响  

EFFECTS OF BaTiO_3 ADDITION ON ELECTRIC PROPERTIES OF NIOBATE LEAD-FREE PIEZOELECTRIC CERAMICS

作　　者：郑凯[1] 沈建兴[1] 马元[1] 范战彪[1] 

机构地区：[1]山东轻工业学院材料科学与工程学院,济南250353

出　　处：《中国陶瓷》2009年第11期32-34,共3页China Ceramics

基　　金：山东省"泰山学者岗位"资金资助;济南市重点科技攻关项目;编号:0406039

摘　　要：采用传统工艺制备了BaTiO3掺杂的KNN-BNT基无铅压电陶瓷(记为KNN-BNT+xBT),并研究了陶瓷的晶相、显微结构及压电,介电性能随x的变化关系。实验发现x=0.05时,陶瓷具有较好的铁电压电性能:d33=157pC/N,kp=34%,εr=671,Qm=92。该体系压电陶瓷具有较高的压电常数和介电性能,具有良好的应用前景。The BaTiO3 modified KNN-BNT （abbreviated to KNN-BNT＋xBT） lead-free piezoelectric ceramics have been synthesized by the conventional ceramic fabrication technique. The effects of BaTiO3 addition on the crystalline phase, microstructure and piezoelectric properties, dielectric properties of the ceramics were studied. It was found that the ceramics for x=0.05 the optimal electric properties were obtained： d33=157pC/ N, kp=31%, ε r=671, Qm=ll2. The results show that the ceramics are good candidates for lead-free piezo-and ferroelectric materials because of their high piezoelectric coefficient and dielectric properties.

关 键 词：铌酸盐 无铅压电陶瓷 压电性能 介电性能 

分 类 号：TQ174.756[化学工程—陶瓷工业]