Barium titanate-based dielectric ceramic material with high energy conversion efficiency and high temperature stability based on Ba (Ti0. 8Sn0. 2) O3 and preparation method of barium titanate-based dielectric ceramic material

The invention relates to a barium titanate-based dielectric ceramic material with high energy conversion efficiency and high temperature stability based on Ba (Ti0. 8Sn0. 2) O3 and a preparation method thereof. The invention belongs to the field of lead-free dielectric ceramic materials. The invention aims to solve the technical problems of low energy storage conversion efficiency and poor temperature stability of the existing lead-free energy storage ceramic material. The material is BTS-xBMH, and the chemical composition of the material is (1-x) Ba (Ti < 0.8 > Sn < 0.2 >) O < 3-x > Bi (Mg < 0.5 > Hf < 0.5 >) O < 3 >, x is smaller than or equal to 0.35. According to the invention, the Ba (Ti0. 8Sn0. 2) O3 component is selected as a substrate material, and an intermediate transition state is introduced, so that different degrees of conversion from ferroelectricity to relaxation of the material can be conveniently regulated and controlled. Bi (Mg0. 5Hf0. 5) O3 is introduced to refine the grain size, the breakd