Abstract
The phase formation, microstructures and microwave dielectric properties of 0.93Mg0.95Zn0.05TiO3–0.07(Ca0.8Na0.1La0.1)TiO3 ceramic system prepared by the conventional solid-state reaction route were investigated with the variation of sintering temperature, aiming to achieve a material with a high quality factor and nearly zero temperature coefficient of resonant frequency. The microwave dielectric properties of the ceramic system were found strongly related to the density, sintering temperature, second phase as well as the microstructure of the samples. The 0.93Mg0.95Zn0.05TiO3–0.07(Ca0.8Na0.1La0.1)TiO3 ceramic sintered at 1225°C showed excellent microwave dielectric properties with εr~22.5, Q×f~79300GHz (at 8GHz) and τf~−0.14×10−6/°C. This finding could be a new candidate material utilized for microwave applications with low loss and temperature-stable characterizations.
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