▎ 摘　　要

NOVELTY - Graphene metal substrate composite radiator comprises metal heat conducting substrate 1 and graphene/silicon heterogeneous composite layer 2, where graphene/silicon heterogeneous composite layer is attached to the surface of the metal heat conducting substrate. The graphene/silicon heterogeneous composite layer is prepared by coating a mixed aqueous solution of graphene micro-sheets and silicon particles on the surface of a metal heat-conducting substrate after ultrasonic treatment, and adding electric field polarization treatment between metal heat-conducting substrate and mixed aqueous solution, and drying. USE - Graphene metal substrate composite radiator. ADVANTAGE - The graphene metal substrate composite radiator quickly radiate heat of a heat source to the air, especially, the internal heat is more effectively converted into electric energy through photoelectric conversion effect of the heterojunction and then it is conducted away from the metal substrate, so that the temperature is quickly reduced, shows better heat dissipation amount, maintain stable operation of the electronic equipment, has reduced height, favorably number of heat dissipation fins, reduced weight, processing difficulty, and cost. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing graphene metal substrate composite heat radiator, which involves: (1) designing the type, shape and size of the metal heat conducting substrate according to a heat source; (2) mixing the graphene nanoplatelets and the silicon particles in water according to a ratio, and performing ultrasonic dispersion uniformly to obtain a mixed solution; (3) coating the mixed solution on the surface of a metal heat-conducting substrate; and (4) adding an electric field between the metal heat conducting substrate and the mixed solution to process the sample obtained, and drying to obtain graphene metal substrate composite radiator. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a graphene metal substrate composite radiator. Metal heat conducting substrate (1) Graphene/silicon heterogeneous composite layer (2) Radiating fins (3)