非化学计量和掺杂对(Na_(1/2)Bi_(1/2))_(0.92)Ba_(0.08)TiO_3陶瓷电性能的影响  

INFLUENCE OF NONSTOICHIOMETRY AND DOPING ON ELECTRICAL PROPERTIES OF (Na_(1/2) Bi_(1/2))_(0.92)Ba_(0.08) TiO_3 CERAMICS

作　　者：初宝进[1] 李国荣[1] 殷庆瑞[1] 张望重[1] 陈大任[1] 

机构地区：[1]中国科学院上海硅酸盐研究所

出　　处：《物理学报》2001年第10期2012-2016,共5页Acta Physica Sinica

摘　　要：研究了非化学计量和掺杂对无铅压电陶瓷 (Na1 2 Bi1 2 ) 0 .92 Ba0 .0 8TiO3的压电性能及去极化温度的影响 .研究发现A位非化学计量可以提高陶瓷的压电性能 ;B位掺杂对材料电学性能的影响规律类似于Pb(Ti,Zr)O3系压电陶瓷的相关规律 ;由于非化学计量和掺杂会影响到A位离子对B位离子与氧离子形成的BO6 八面体的耦合作用 ,影响到畴的稳定性 ,从而影响到 (Na1 2 Bi1 2 ) 0 .92 Ba0 .0 8TiO3陶瓷的去极化温度 ;所研究的陶瓷样品的去极化温度越低 ,压电系数越高 .Influence of nonstoichiometry and doping on piezoelectric properties and depolarization temperature of lead-free piezoelectric ceramics (Na1/2Bi1/2)(0.92)Ba0.08TiO3 [NBBT] was studied. Nonstoichiometry of A-site can improve their piezoelectric properties. Doping in B-site has great influence on electric properties, which is similar to the corresponding rules of Pb(Ti, Zr) O-3-based ceramics. Variation of coupling effect of A-site cation on BO6 octahedra as results of nonstoichiometry, and the doping in NBBT ceramics leads to variations of the depolarization temperature. The higher the depolarization temperature of Na1/2Bi1/2TiO3-BaTiO3 ceramics studied,the lower the piezoelectric constant.

关 键 词：(Na1/2Bi1/2)0.92Ba0.08TiO3 无铅压电陶瓷 非化学计量 掺杂 电性能 无极化温度 

分 类 号：TQ174.4[化学工程—陶瓷工业]