▎ 摘　　要

NOVELTY - Preparing alumina-graphene with core-shell structure comprises (1) plating diamond-type carbon film on a stainless steel substrate to obtain a lower substrate sheet, (2) spreading aluminum oxide nanoparticles on diamond-type carbon film interface of lower substrate to obtain upper substrate, and (3) under inert gas conditions, the upper substrate and the lower substrate are alternately rotating and milling in same direction in a clockwise direction as the positive direction to prepare alumina-graphene with core-shell structure. USE - The method is useful for preparing alumina-graphene with core-shell structure. ADVANTAGE - The method: is simple and suitable for industrial production, and has strong operability and possible mass production. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for core-shell structure of alumina-graphene comprising has spherical structure, with alumina as core, graphene as shell, and a range of friction coefficient is 0.020-0.028, the graphene shell has multilayer structure, the thickness of a single layer is 0.4-0.5 nanometers, and the purity is not greater than 75%.