Temperature-stable capacitor ceramic powder with core-shell structure and preparation method and application thereof

The invention discloses temperature-stable capacitor ceramic powder with a core-shell structure and a preparation method and application thereof, and relates to the technical field of ceramic materials and manufacturing thereof, the main component is BaTiO3, and the BaTiO3 is doped with a modifier and glass powder; the modifying agent is prepared from the following components: TiO2, NaCO3 and Nb2O5; the glass powder comprises a Li-B-Si glass compound and a Bi-B glass compound. A proper amount of dopant is added during formula design, so that residual doped modified substances are attached to the surface of a crystal grain shell layer when a medium is thick, and when a medium layer is thinned, the concentration gradient of a weakened core-shell structure is compensated, and stable capacity temperature change rate and small medium loss are kept. The invention solves the problems of unstable capacity temperature change rate and increased loss of the existing medium and low temperature sintered barium titanate-ba