人工晶体学报2011，Vol.40Issue(6)：1471-1477,7.
Sr和Nb复合掺杂Bi4Ti3O12基高温压电陶瓷的研究
Sr and Nb Co-doped Bi4Ti3O12-based High Temperature Piezoelectric Ceramics
摘要
Abstract
Bismuth layer-structured ferroelectric ceramics of Bi4Ti3012 +0.91 wt% Nb2O5 +xwt% SrCO3(0sS*s￡ 1.50) were synthesized by traditional solid state reaction. The effects of Sr addition on the nricrostructure and electrical properties of ceramics were studied. The results indicated that all ceramics have a bismuth oxide layered structure. After Sr doping, the size of grain becomes small and unanimous. The difluse phase transition behavior was observed, meanwhile, the piezoelectric, electromechanical and ferroelectric properties of BTNO-based ceramics were improved by an appropriate amount of Sr addition. When x =0. 50, the ceramic achieves an optimum performance: the relative density p = 98. 8 %, piezoelectric constant ds = 22 pC/N, planar electromechanical coupling coefficient kp =9.5 % , mechanical quality factor Qm =4462, remanent polarization Pr = 13.01μC/cm2, and Curie temperature Tc =620 °C. Moreover, the researches on dielectric properties and thermal annealing indicate that the ceramic with composition of x =0.50 possesses high piezoelectric stability, demonstrating that the ceramic is suitable for high-temperature and high-frequency piezoelectric devices.关键词
压电陶瓷/微观结构/机电性能/Bi4Ti3O12Key words
piezoelectric ceramics/ microstructure/ electromechanical properties/ Bi4Ti3012分类
化学化工引用本文复制引用
杨庆,江向平,余祖灯,涂娜,陈超,陈燕..Sr和Nb复合掺杂Bi4Ti3O12基高温压电陶瓷的研究[J].人工晶体学报,2011,40(6):1471-1477,7.基金项目
国家自然科学基金(50862005,51062005,91022027) （50862005,51062005,91022027）
江西省教育厅项目(GJJ11197) （GJJ11197）
江西省主要学科学术和技术带头人培养对象计划项目([2010]224) （[2010]224）
