▎ 摘　　要

NOVELTY - Preparation of graphene composite material involves (a) weighing a certain amount of graphite, placing the graphite into a grinder, grinding and pulverizing to obtain graphite particles, (b) adding graphite particles to a certain amount of ethanol solution, stirring uniformly, and stripping under action of ultrasonic stripping equipment to obtain graphene oxide dispersion, (c) adding graphene oxide dispersion to dimethylformamide solution, and stirring mixed solution under action of a uniform device, and stirring aqueous solution by adding hydrazine hydrate and aqueous ammonia, and reducing in reaction vessel to obtain aqueous graphene solution, (d) distilling graphene aqueous solution in distillation dish to obtain a graphene sheet, and grinding graphene sheet by spherical grinder to obtain pulverized particles and (e) reacting graphene in a high-temperature PVT growth furnace by a certain proportion of hydrogen and nitrogen, then introducing argon gas and heating, and then cooling. USE - Preparation of graphene composite material. ADVANTAGE - The method effectively avoids the agglomeration of the graphene. DETAILED DESCRIPTION - Preparation of graphene composite material involves (a) weighing a certain amount of graphite, placing the graphite into a grinder, grinding and pulverizing through a 200-300 mesh sieve to obtain graphite particles, (b) adding graphite particles to a certain amount of ethanol solution, stirring uniformly, and stripping the mixed solution under action of ultrasonic stripping equipment to obtain graphene oxide dispersion, (c) adding graphene oxide dispersion to dimethylformamide solution, and stirring mixed solution under action of a uniform device for 1-2 hours, and stirring aqueous solution by adding hydrazine hydrate and aqueous ammonia, and reducing in reaction vessel to obtain aqueous graphene solution, (d) distilling graphene aqueous solution in distillation dish to obtain a graphene sheet, and grinding graphene sheet by spherical grinder to obtain pulverized particles and (e) reacting graphene in a high-temperature PVT growth furnace by a certain proportion of hydrogen and nitrogen at a temperature of 1500-1600 for 2-3 hours, then introducing argon gas and heating at 2000-2300 degrees C, and then cooling.