A temperature-stable and high-Q microwave dielectric ceramic of the MgTiO3-(Ca0.8Sr0.2)(Zr0.1Ti0.9)O-3 system

摘要

The (1-x)MgTiO3(MT)-x(Ca0.8Sr0.2)(Zr0.1Ti0.9)O-3(CSZT) ceramic system prepared by using the conventional solid state method was investigated in terms of its microstructures and microwave dielectric properties. To achieve a temperature-stable material, two compounds with negative and positive temperature coefficients were used to form mixed phases. The microwave dielectric properties are strongly correlated with composition. For practical application, a dielectric constant (epsilon(r)) of 22.1, a quality factor (Q x f value) of 116,000 GHz, and a temperature coefficient of resonant frequency (tau(f)) of 5 ppm/degrees C for 0.95MgTiO(3)-0.05(Ca0.8Sr0.2)(Zr0.1Ti0.9)O-3 sintered at 1300 degrees C for 4 h are proposed. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.