▎ 摘　　要

NOVELTY - Preparing high-temperature oxidation-resistant thermally conductive graphene-based ceramic composite material involves: (1) preparing supersaturated fluorosilicic acid solution using fluorosilicic acid solution and silica gel, and mixing boric acid powder, graphene and water to prepare a mixed solution; (2) dripping the mixed solution to supersaturated fluorosilicic acid solution under ultrasonic condition, and uniformly mixing to obtain a precursor solution; and (3) transferring the precursor solution to a water bath at 50-70 degrees C, stirring and reacting for 4-8 hours, and collecting the solid product in a reaction system, and drying. The mass ratio of: fluorosilicic acid and boric acid is (7-13 g):1 mg; and fluorosilicic acid and graphene is (1.8-5 g):1 mg. USE - The method is useful for preparing high-temperature oxidation-resistant thermally conductive graphene-based ceramic composite material. ADVANTAGE - The method: has simple operation process, mild reaction condition, low raw material cost, and good repeatability; and can uniformly and continuously deposit silicon dioxide nano-spherical particles on the graphene surface, which solves graphene agglomeration problem, and improves graphene thermal conductive performance under high temperature aerobic environment.