Abstract
Glass-ceramic materials based on B2O3–La2O3–MgO–TiO2 (BLMT) glass with La(Mg0.5Ti0.5)O3 ceramics were fabricated. The sintering behavior and microwave dielectric properties of glass-ceramic were investigated. All samples can be sintered below 900 °C. In the sintering process, LaBO3 and TiO2 phases appeared as a result of the reaction between La(Mg0.5Ti0.5)O3 ceramics and the BLMT glass. With the increase in sintering temperature, the densities and Q×f of glass-ceramic firstly increased and then decreased for all samples, but εr presented different variations. τf increased with the increase in sintering temperature because of the decrease in La(Mg0.5Ti0.5)O3 phase and the increase in LaBO3 phase. La(Mg0.5Ti0.5)O3–BLMT (60:40, in mol %) glass-ceramic sintered at 875 °C had excellent microwave dielectric properties: εr=15.9; Q×f=14300 GHz; and τf=35.3 ppm/°C.
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