Silicon carbide coating with high conduction heat and high heat radiation and preparation method thereof

The invention discloses a silicon carbide coating with high conduction heat and high thermal radiation and a preparation method thereof. The silicon carbide coating comprises modified silicon carbide powder, gelatin-coated silicon carbide hollow microspheres, inorganic powder, a metal oxide, a polymerization inhibitor, a flatting agent, a dispersing agent and inorganic resin. Wherein the modified silicon carbide powder is subjected to modification treatment through combination of hydrolytic polymaleic anhydride and a silane coupling agent, the gelatin-coated silicon carbide hollow microspheres are soaked in an HCl solution, then the silicon carbide hollow microspheres are washed to be neutral, and coating treatment is carried out in gelatin; the preparation method comprises the following steps: S101, preparing a coating matrix; s102, preparing silicon carbide hollow microspheres coated with gelatin; s103, preparing a silicon carbide primary material; and S104, preparing the silicon carbide coating. According