▎ 摘　　要

NOVELTY - Full-carbon thermally conductive composite material is prepared by uniformly dispersing 0.1-0.5 pts. wt. expanded graphite and 100-150 pts. wt. N-methylpyrrolidone at 140-160 degrees C for 5-10 hours to obtain a graphene dispersion. The obtained graphene is dispersed under ultrasonic centrifugation, and then suction filtered to remove N-methylpyrrolidone solvent, washed with water to obtain graphene solution and freeze dried to obtain a graphene powder. The prepared graphene is put into a plasma-enhanced chemical vapor deposition (PECVD) system device in vacuum at 500-700 degrees C. The plasma source is turned on for graphene and then naturally cooled at room temperature to obtain sample of vertical graphene. The obtained graphene surface-grown vertical graphene sample is mixed with the mesophase pitch and pressure-melted. USE - Full-carbon thermally conductive composite material. ADVANTAGE - The full-carbon thermally conductive composite material has better thermal and mechanical properties, and wide application range of carbon composite materials.