▎ 摘　　要

NOVELTY - Preparing composite wave-absorbing material involves using hexamethylenetetramine as inducer to induce soluble cobalt salt and soluble nickel salt to perform in-situ reduction on graphene oxide sheet layer to obtain composite wave-absorbing material. The composite wave-absorbing material comprises reduced graphene oxide, cobalt (Co) magnetic micro-nano particles and nickel (Ni) magnetic micro-nano particles loaded on reduced graphene oxide. USE - Method for preparing composite wave-absorbing material ADVANTAGE - The method enables to have high-efficiency broadband, improves impedance matching characteristic, wave absorbing performance, heat stability and oxidation resistance, and prolongs service life.