Nb_2O_5掺杂对BZT-BCT无铅压电陶瓷电性能的影响  

Effect of Nb_2O_5-doped on Electrical Properties of 0.5Ba(Zr_(0.2)Ti_(0.8))O_3-0.5(Ba_(0.7)Ca_(0.3))TiO_3 Ceramics

作　　者：张诚[1] 刘其斌[1,2] 黄小琴[1] 

机构地区：[1]贵州大学材料与冶金学院,贵阳550025 [2]凯里学院化学与材料工程学院,凯里556011

出　　处：《中国陶瓷》2013年第11期16-18,22,共4页China Ceramics

摘　　要：采用固相合成法制备Nb2O5与MnO2掺杂0.5Ba(Zr0.2Ti0.8)O3-0.5(Ba0.7Ca0.3)TiO3无铅压电陶瓷。通过XRD、SEM和准静态d33测试仪等手段研究了Nb2O5掺杂对陶瓷显微结构与电性能的影响。结果表明,含量为0.5 mol%的Mn4+和不同含量的Nb5+作为受主掺杂离子进入B位能完全固溶于BZT-BCT陶瓷,材料具有典型的钙钛矿型结构。Nb2O5掺杂量为0 mol%时,陶瓷有最佳压电性能,压电常数d33、机电耦合系数K p分别为335 pC/N、39.5%;掺杂量为2.0 mol%时,陶瓷具有最佳介电性能,介电常数ε、介电损耗tanδ分别为8738、1.19%。To obtain lead-free 0.5Ba （Zr0.2Ti0.8）O3-0.5（Ba0.7Ca0.3）TiO3 ceramics with excellent electrical properties,BZT-BCT ceramics doping Nb2O5 and MnO2 was synthesized follow a conventional solid state reaction route. By means of SEM, XRD, quasi-static d33 meter, the influence of Nb2O5-doped on microstructure and electrical properties of BZT-BCT-Mn-Nb ceramics was discussed. The results show that Mn4＋and Nb5＋ diffuse into the BaTiO3 lattice and form a homogeneous solid solution, which a typical perovskite-type structure. When doping Nb2O5 with 0 mol%, the optimum piezoelectric coefficient and Kp of sample are 335 pC/N and 39.5%, respectively. When doping Nb2O5 with 2.0 mol%,the optimum dielectric constant and dielectric loss of sample are 8738 and 1.19%, respectively.

关 键 词：无铅压电陶瓷 Nb2O5掺杂 压电性能 介电性能 

分 类 号：TQ174.75[化学工程—陶瓷工业]