摘要
采用二次合成法制备了新型0.92[Bi0.5(Na0.7K0.25Li0.05)0.5]TiO3-0.08Ba(Ti,Zr)O3+x(wt%)(质量分数)MnO2体系无铅压电陶瓷,研究了陶瓷的晶相结构、表面形貌、压电介电性能。研究结果表明,制备的陶瓷样品均具有单一钙钛矿结构。MnO2的含量为x=0.003时,得到介电损耗低的压电陶瓷:介质损耗tanδ为0.0361,压电常数d33为155pC/N,机电耦合系数kp为0.26,机械品质因素Qm为202;在1160℃,2h的烧结条件下,能够获得致密的无铅压电陶瓷体。
A new-type Lead-free piezoelectric ceramic 0. 92[Bi0.5(Na0.7K0.25Li0.05)0.5]TiO3-0.08Ba(Ti,Zr)O3 + x (wt%) MnO2 was fabricated by a two-step sintering process. Crystalloid structure, surface images, piezoelectric and dielectric properties of the ceramics were studied. The results indicate that this system ceramics possess single perovskite structure . Lower loss tangent was obtained at x=0. 003. The main parameters for the composition of x=0. 003 are: tanδ= 0. 0361, d33:155pC/N, kp=0.21, Om :202. The samples could be sintered densely at 1 160℃ for 2h in air.
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2009年第3期469-471,479,共4页
Journal of Materials Science and Engineering
关键词
无铅压电陶瓷
掺杂
压电常数
机电耦合系数
lead-free piezoelectric ceramics
doping
piezoelectric coefficient
electromechanical coupling factors