▎ 摘　　要

NOVELTY - Preparing nano- alpha -alumina-loaded thermally reduced graphene comprises mixing the graphene oxide slurry with concentration of 3-5% and the nano-gamma-alumina dispersion with concentration of 5-30%, and ultrasonically stirring the electrostatic self-assembly for 0.5-5 hours, then centrifugal freeze-drying to obtain nano-alumina loaded graphene oxide powder, heating the obtained powder to 600-2000 degrees C under nitrogen protection and insulating for 0.5-2 hours to obtain thermally reduced graphene supported by the nano- alpha -alumina, where the mass ratio of nano-gamma-alumina and graphene oxide is 1:1-50:1. USE - The method is useful for preparing nano-alpha-alumina-loaded thermally reduced graphene. ADVANTAGE - The method: has simple and easy processing technology; and does not involve the use of toxic solvents. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for nano- alpha -alumina-loaded thermally reduced graphene obtained by above mentioned method; #thermal interface material filled with thermally reduced graphene filled with nano-alpha-alumina supported by the above mentioned method, comprising supporting thermally reduced graphene by the nano- alpha -alumina is 0.5-10 wt.% of the thermal interface material; and #high thermal conductivity electrically insulating elastomer thermal interface material containing nano- alpha -alumina-loaded thermally reduced graphene, comprising 100 pts. wt. silicone gel, 0.5-20 pts. wt. nano- alpha -alumina loaded thermally reduced graphene, 200-1200 pts. wt. micron alumina, 0.01-3 pts. wt. platinum catalyst, and 2-20 pts. wt. silicone oil plasticizer.