Dielectric Properties and Microstructure of MgO-TiO^sub 2^-ZnO-CaO Ceramics

The effects of CaTiO^sub 3^ addition on the microstructure, phase formation, and dielectric properties of MgO-TiO^sub 2^-ZnO ceramics were investigated. The sintering temperature of CaTiO^sub 3^-doped (Mg^sub 0.63^Zn^sub 0.37^)TiO^sub 3^ ceramics can be lowered to 1290°C when the additive is used. The dielectric properties are found to be strongly correlated with the amount of CaTiO^sub 3^ addition. At 1290°C, (Mg^sub 0.63^Zn^sub 0.37^)TiO^sub 3^ ceramic with 1.0 mol% CaTiO^sub 3^ exhibited a dielectric constant ε^sub r^ of 23.3, dielectric loss tan δ of 1 × 10^sup -5^, and temperature coefficient of capacitance (TCC) of 10 ppm/°C. [PUBLICATION ABSTRACT]