Microwave dielectric ceramic material, preparation method and application

The invention provides a microwave dielectric ceramic material, a preparation method and application, and relates to the technical field of ceramic materials. The microwave dielectric ceramic material comprises MgTiO3, (Mg0.5Zn0.5)Al2O4 and (Ca0.8Sr0.2)TiO3, wherein the mass of the MgTiO3 accounts for 75%-85% of the mass of a ceramic main material; the mass of the (Mg0.5Zn0.5)Al2O4 accounts for 10%-15% of the mass of the ceramic main material; the mass of the (Ca0.8Sr0.2)TiO3 accounts for 5%-10% of the mass of theceramic main material. According to the invention, under the condition that the dielectric constant epsilon r of the microwave dielectric ceramic material provided by the invention is kept at 20 +/- 1, the quality factor Q * f can reach 57000-70000GHz, and the temperature coefficient of resonance frequency tau f is close to 0; meanwhile, the thermal shock temperature difference [delta]Tmax of the microwave dielectric ceramic is 125-130 DEG C, so that the microwave dielectric ceramic has relatively hi