Sintering behavior and microwave dielectric properties of MgTiO 3 obtained from coprecipitation method with additives

MnO 2 and ZnO additives, at three different weight percentages of 0.7, 1.4, and 2.1 wt%, were added to pure MgTiO 3 ceramic obtained by coprecipitation method. Effects of these additives on microstructure, density, and dielectric properties of bulk products were investigated. The density of sample prepared from the synthesized MgTiO 3 powder was 3.65 g/cm 3 after sintering at low temperature of 1050 ̊C. Results showed that the density of samples consolidated from MgTiO 3 submicrometer particles (less than 200 nm) containing 2.1 wt% MnO 2 and ZnO was increased to 3.71 g/cm 3 and 3.78 g/cm 3 , respectively, at low sintering temperature of 1050̊C. Also, the dielectric properties of sample containing 2.1 wt% ZnO were the best with ε r of 16.9 and Q×f of 141000 GH z.