Ni-Zn共掺对(Mg_(0.95)Ca_(0.05))TiO_3陶瓷介电性能的影响  

Effects of Ni-Zn co-doping on dielectric properties of (Mg_(0.95)Ca_(0.05))TiO_3 ceramics

作　　者：曾凤[1] 周洪庆[1] 谢文涛[1] 黄芳[1] 

机构地区：[1]南京工业大学材料科学与工程学院材料化学工程国家重点实验室,江苏南京210009

出　　处：《中南大学学报（自然科学版）》2013年第9期3640-3644,共5页Journal of Central South University:Science and Technology

基　　金：江苏省科技支撑资助项目(BE2009168);江苏省科技支撑资助项目(BE2009168);长江学者和创新团队"创新团队"发展计划项目(IRT1146)

摘　　要：采用固相反应法制备(Mg0.95Ca0.05)TiO3陶瓷,探讨Ni-Zn共掺对(Mg0.95Ca0.05)TiO3陶瓷物相组成、微观结构和介电性能的影响。研究结果表明:复合添加NiO和ZnO,可在一定程度上抑制第二相MgTi2O5的产生,并能有效地降低烧结温度至1 300℃。当NiO和ZnO添加总量(质量分数)为2%,w(NiO)/w(ZnO)为0.5%:1.5%时,陶瓷在1 300℃烧结获得最佳介电性能:介电常数εr=20.39,7.67 GHz时的介电损耗tanδ=2.01×10-4,频率温度系数τf=-1.72×10-6/℃。(Mg0.95 Ca0.05)TiO3 ceramics were prepared by conventional solid-state route.The effects of Ni-Zn co-doping on the phase formation,the microstructures and dielectric properties of(Mg0.95 Ca0.05)TiO3 ceramics were investigated.The results show that the formation of second phase MgTi2 O5 can be restrained to a certain extent through the co-doped NiO and ZnO.Also the sintering temperature of Ni-Zn co-doped(Mg0.95 Ca0.05)TiO3 ceramics can be decreased to 1 300 ℃ effectively.At 1 300 ℃,the ceramics possess excellent dielectric properties with εr =20.39,tanδ=2.01×10-4(7.67 GHz),τf =-1.72×10 6/℃ when w(NiO +ZnO) is 2% and w(NiO)/w(ZnO) is 0.5%:1.5%.

关 键 词：(Mg1-xCax)TiO3 w(NiO)/w(ZnO) 介电性能 

分 类 号：TQ174.1[化学工程—陶瓷工业]