A magnetic metal composite biomass carbon material with high efficiency and broadband wave absorbing property

With the rise of wireless communication technology, while bringing convenience to people’s lives, the problem of electromagnetic pollution has become increasingly serious; therefore, there is an urgent need to find a new type of absorbing material with strong absorption performance, wide absorption band, thin thickness, and light weight to improve people’s living environment. Biomass-derived porous carbon has attracted much attention as a dielectric loss absorbing material; through the simple technological process, the composite magnetic metal can achieve excellent impedance matching and high efficient broadband wave absorption performance. In this experiment, Eupatorium adenophora was used as the raw material, and the metal composite porous carbon material was obtained by compounding Fe metals through the impregnation process and pyrolysis. When the impregnation ratio is 9