▎ 摘　　要

NOVELTY - The method involves weighing graphene, graphene oxide, aluminum oxide, potassium chloride, magnesium oxide, pure aluminum, pure copper powder and mixed. The mixed powder is put in a ball milling tank, after vacuumizing, ball milling to obtain the uniformly mixed composite powder. The composite powder is pressed into a certain size of the prefabricated block under the vacuum environment. The prefabricated block is extruded after heat preservation under the temperature of 450 to 500 degrees centigrade in the extruding cylinder. The aluminum alloy is placed in the smelting furnace at 700 to 750 degrees centigrade, heat is smelted and preserved to obtain the aluminum alloy melt. The prepared prefabricated material is added into the aluminum alloy melt, fully stirred uniformly, and high-purity argon gas is blown into the melt during stirring. The melt is casted and molded to obtain the graphene-aluminum-based composite material, after stirring and blowing. USE - Method for preparing graphene aluminum-based composite material. ADVANTAGE - The preparation method is low in cost and simple and convenient in process, and effectively reduces the reaction of graphene, graphene oxide and the aluminum matrix on the liquid surface and improves the wettability of the graphene, the graphene oxide and the aluminum matrix. The thermal conductivity of the graphene aluminum-based composite material is improved by 15-30% compared with that of a material without graphene, and a feasible scheme is provided for large-scale preparation of the high thermal conductivity graphene composite material. The graphene aluminum-based composite material is uniform in component distribution, high in heat and electric conductivity and low in cost. The composite prefabricated blocks of aluminum and graphene oxide with different mass fractions are prepared according to actual requirements and added into an aluminum alloy melt, so that the heat conductivity of the obtained graphene aluminum-based composite material is remarkably improved. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of the change in thermal conductivity of the aluminum silicon alloy composite after the graphene composite was not added and added. (Drawing includes non-English language text)