▎ 摘　　要

NOVELTY - A graphene foam composite wave-absorbing material comprises foam framework comprising graphene sheet layers and modified sheet-shaped iron-silicon-aluminum material completely covered in framework. USE - Graphene foam composite wave-absorbing material. ADVANTAGE - The material is good for reducing reflection of electromagnetic wave material and for energy entering wave absorbing material, has large number of hole structure, and improves absorbing ability. The graphene in structure completely covers sheet-shaped iron-silicon-aluminum in foam framework, and improves matching of two kinds of wave absorbing material that is good for expanding absorption frequency width of material. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing graphene foam composite wave-absorbing material comprising preparing raw material graphene oxide dispersion liquid, weighing sheet iron-silicon-aluminum powder, pre-processing to obtain pre-processed iron-silicon-aluminum powder, performing surface modification to obtain modified sheet iron-silicon-aluminum powder, adding into graphene oxide dispersion liquid to react to obtain mixed solution, concentrating, transferring to mold for quick-freezing and shaping, freeze-drying to remove water to obtain composite material, and annealing.