Structure and properties analysis for MgTiO3 and (Mg0.97M0.03)TiO3 (M=Ni, Zn, Co and Mn) microwave dielectric materials

Abstract Single phase of MgTiO 3 and (Mg 0.97 M 0.03 )TiO 3 (M = Ni, Zn, Co and Mn) ceramics was synthesized at the sintering temperature of 1275 °C. Relationships between structure and microwave dielectric properties were investigated on the basis of Rietveld refinement. The dielectric constant ( e r ) was affected by the relative density and the dielectric polarizability. The quality factor (Qf) increased with the increase of the packing fraction. The temperature coefficient of resonant frequency ( τ f ) moved toward positive due to the increase of A-site bond valence.