▎ 摘　　要

NOVELTY - Preparing silicon carbide-graphene composite powder comprises e.g. either mixing expanded graphite with silicon containing raw material, ball milling to obtain composite powder, then heating to obtain silicon carbide-graphene composite powder; or mixing expanded graphite and silicon-containing raw materials, ball milling to obtain composite powder, then mixing catalyst with anhydrous ethanol solution, composite powder and stirring, rotating, heating catalyst precursor to obtain carbonized silicon-graphene composite powder. USE - The method is useful for preparing silicon carbide-graphene composite powder (claimed). ADVANTAGE - The method has simple technique, short production period and low cost; and the prepared product has high specific surface area, excellent optical performance and excellent electrical performance. DETAILED DESCRIPTION - Preparing silicon carbide-graphene composite powder comprises either mixing 40-80 pts. wt. expanded graphite with 20-60 pts. wt. silicon containing raw material, ball milling to obtain composite powder, then heating under condition argon gas at 800-1400 degrees C for 1-6 hours to obtain silicon carbide-graphene composite powder; or mixing 40-80 pts. wt. expanded graphite and 20-60 pts. wt. silicon-containing raw materials, ball milling for 60-120 minutes to obtain composite powder, then mixing 0.5-10 pts. wt. catalyst with 100 ml anhydrous ethanol solution to obtain catalyst-anhydrous ethanol solution, then adding 100 pts. wt. composite powder into 5-100 pts. wt. catalyst-anhydrous ethanol solution and stirring at room temperature for 20-24 hours, rotating at 30-80 degrees C to obtain catalyst precursor loaded powder, heating catalyst precursor loaded powder at 800-1400 degrees C for 1-6 hours under argon gas atmosphere to obtain carbonized silicon-graphene composite powder; or mixing 40-80 pts. wt. expanded graphite and 20-60 pts. wt. silicon-containing raw materials, ball milling for 60-120 minutes to obtain composite powder, then adding 10-100 pts. wt. isobam104, 100 pts. wt. deionized water, stirring at 40-100 degrees C for 1-2 hours to obtain protecting agent solution, adding 0.5-10 pts. wt. catalyst into 100 pts. wt. protective agent solution to obtain mixed solution of catalyst and protective agent, then adding 100 pts. wt. composite powder into 10-100 pts. wt. the mixed solution of catalyst and protecting agent, stirring at room temperature for 20-24 hours, freezing and drying at 800-1400 degrees C, and then heating for 1-6 hours under argon gas atmosphere to obtain final product.