Preparation and properties of 0.94(Mg1-xZnx)TiO3-0.06(Ca0.8Sr0.2)TiO3 microwave dielectric ceramics
In order to reduce the sintering temperature of MgTiO3-(Ca0.8Sr0.2)TiO3(MT-CST)microwave dielectric ceramics and improve their microwave dielectric properties,the A-site Zn2+doping was performed on MT-CST ceramics by chemical precipitation method,the effects of Zn2+doping on the microstructure,sintering temperature and microwave dielectric properties of MT-CST ceramics were studied.The results show that the substitution of Mg2+by Zn2+can increase the density of ceramics,reduce the dielectric loss and improve quality factor value.The sintering temperature of MT-CST ceramics can be successfully reduced to 1 125 ℃.The as-prepared ceramics have excellent microwave dielectric properties,with dielectric constant of 21.6,quality factor of 50 800 GHz and temperature coefficient of resonance frequency of 0.24 × 10-6/℃,respectively.
万方数据
