Cordierite-doped multiphase microwave dielectric ceramic material as well as preparation method and application thereof

The invention provides a cordierite-doped multiphase microwave dielectric ceramic material as well as a preparation method and application thereof, and relates to the technical field of 5G microwave dielectric ceramic materials. The cordierite-doped multiphase microwave dielectric ceramic material provided by the invention comprises a main material and a modified doping agent, and the main material is CaTiO3-SmAlO3; the modified doping agent is cordierite, the composition of the cordierite is 2MgO. 2Al2O3. 5SiO2, and the addition amount of the cordierite in the multiphase microwave dielectric ceramic material is 0.5%-2%. The multiphase microwave dielectric ceramic material provided by the invention has good comprehensive performance, the dielectric constant epsilon r of the multiphase microwave dielectric ceramic material can reach 45, the quality factor Qf is greater than or equal to 45,000, the bending strength is greater than or equal to 278 MPa, the thermal shock temperature is 150 DEG C, the reliability