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.
出处
《中国陶瓷》
CAS
CSCD
北大核心
2013年第11期16-18,22,共4页
China Ceramics
关键词
无铅压电陶瓷
Nb2O5掺杂
压电性能
介电性能
lead-free piezoelectric ceramic
Nb2O5-doped
piezoelectric property
dielectric property
