▎ 摘　　要

NOVELTY - Graphene composite absorbing material comprises carbonyl iron and graphene uniformly. USE - Graphene composite absorbing material used in microwave absorbing technology field. ADVANTAGE - The graphene composite absorbing material is adjustable by adjusting the mass ratio of graphene and carbonyl iron and composite material thickness, has high intensity and wide absorbing frequency band, small density, and has high absorption capacity at different frequencies. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing graphene composite wave-absorbing material, which involves: (A) utilizing natural crystalline flake graphite as raw material, using improved Hummers method to prepare graphite oxide; (B) adding the graphite oxide into deionized water, ultrasonically dispersing for 0.5-1hours, to obtain the graphite oxide dispersion; (C) adding the carbonyl iron into glycol, ultrasonically dispersing for 0.5-1hours, to obtain the carbonyl iron liquid; (D) adding the graphite oxide dispersion and uniformly mixing carbonyl iron liquid; (E) ultrasonically and mechanically stirring for 0.5-1hours, to obtain mixed solution; (F) adding concentrated hydrochloric acid into the mixed solution, and then ultrasonically and mechanically stirring for 1-3hours, to obtain reaction solution; and (G) filtering the reaction liquid, washing and drying to obtain the graphene composite wave-absorbing material.