▎ 摘　　要

NOVELTY - Producing graphene-magnetic particle composite, comprises (a) dissolving or distributing metal salt containing at least one magnetic metal, and graphene in water and/or organic solvent, and treating mixed solution at 40-120 degrees C, and (b) aging in presence of water at 80-200 degrees C. USE - The graphene-magnetic particle composite is useful in producing electromagnetic wave shielding material (claimed). ADVANTAGE - The composite has excellent physical properties and electromagnetic wave shielding efficiency. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for producing electromagnetic wave shielding material, comprising (a) mixing the graphene-magnetic particle composite with polymer, and (b) molding in film form.