▎ 摘　　要

NOVELTY - Preparation of wave-absorbing material involves mixing a sheet-shaped magnetic metal material, a granular magnetic metal material, graphene oxide and a reducing agent, reacting in a solvent to obtain a composite hydrogel containing graphene, drying, and mixing with a carrier. USE - Preparation of wave-absorbing material (claimed). ADVANTAGE - The method improves the impedance matching property of the material, which is good for the introduction of electromagnetic wave into the material by introducing magnetic metal micropowder with high magnetic conductivity. The typical wrinkled and undulating sheet structure of graphene aerogel provides more storage space for the magnetic metal load by adsorbing the magnetic metal micropowder on the surface of reduced graphene oxide. The wrinkled and undulating microstructure is easy to form a porous structure. The magnetic metal micropowder comprises sheet-shaped and granular magnetic metal materials, which can form three-phase three-dimensional porous structure, prolongs the propagation path of microwaves, consumes more electromagnetic energy, and improves the microwave absorption performance of the material.