▎ 摘　　要

NOVELTY - Preparing graphene heat dissipation coating comprises (1) pre-grinding graphene and carbon black to a preset size, and microwave baking at 650-800°C for 30-40 hours to obtain graphene and carbon black mixture A, where the graphene and carbon black mass ratio is 0.5-1.5:1.5-5, and (2) mixing and stirring 0.5-2% mixed glue, 2-6.5% graphene and carbon black mixture A, 1-3% carbon nanotubes, 85-95% graphite and pure water or deionized water (balance) to obtain a solid-liquid mixture B, arranging the graphite presents a multi-shell polyhedron structure and the carbon layers concentrically, where the viscosity of the solid-liquid mixture B is 10-180 degrees Baume, and the solid-liquid ratio in the solid-liquid mixture B is 2:8-5:5, and the mixed glue includes acrylic glue, trimethyl phosphate glue, polyurethane glue, styrene-butadiene rubber, flexible resin glue and organic silica gel. USE - The method is useful for preparing graphene heat dissipation coating. ADVANTAGE - The method improves the heat dissipation effect of the heat dissipation sheet made of the graphene heat dissipation coating. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: a graphene heat dissipation coating; and a graphene heat sink, where the heat sink is prepared by comprises spraying the graphene heat dissipation coating on the coating substrate or the target heat sink, controlling the thickness of the coating, and calcining the coated substrate after spraying at 60-120℃ to obtain a sheet-shaped graphene heat sink.