▎ 摘　　要

NOVELTY - Graphene-coated substrate material comprises metal oxides, metal nitrides and/or non-metallic carbon materials, and graphene coated on surface of substrate. USE - Used as graphene-coated substrate material. ADVANTAGE - The material: improves thermal conductivity of thermal grease, ensures electronic equipment operates within normal temperature range for long time, extends service life, and has good economic benefits. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) preparing graphene-coated substrate material comprising placing substrate into reactor, heating to 900-1700 degrees C in an inert protective gas environment, introducing carbon source gas, and reacting for 0.5-5 hours to obtain graphene-coated substrate material, the flow ratio of the carbon source gas and the inert protective gas is 1:10-1:1, and the gas flow rate of the carbon source gas and the inert protective gas is 10-500 ml/minutes; (2) graphene thermal conductive silicone grease made of novel graphene-coated substrate material comprising a thermally conductive filler, a base silicone oil, and a modified dispersant, the thermally conductive filler includes a graphene-coated matrix material and an uncoated graphene metal oxide, the mass fraction of the metal oxide of the uncoated graphene is 20-85%, the mass fraction of the novel graphene-coated matrix material is 5-65%, the mass fraction of modified dispersant is 0.5-2%, and the mass fraction of the base silicone oil is 9-15%; and (3) preparing graphene thermal conductive silicone grease comprising (1) mixing graphene-coated matrix material and metal oxide not coated with graphene to obtain a thermally conductive filler, and (2) premixing thermal conductive filler, base silicone oil and modified dispersant at a certain temperature, and grinding with a three-roll mill for a certain period of time to obtain thermal conductive silicone grease.