Microstructure and electromagnetic wave absorption properties of FeCo/graphene composites prepared by electrical wire explosion method

Combining graphene with other materials is an effective way to improve impedance-matching performance. The existing synthetic methods of graphene composites are mainly chemical synthesis, with low efficiency and complex raw materials. In this paper, the carbon-based material is produced by using the electrical wire explosion method in a polymer polyethylene cavity, and the FeCo/Graphene composite material is synthesized in one step. The effects of the burst parameters on the composition, structure, electromagnetic parameters, and impedance-matching ability of FeCo/Graphene were investigated by varying the mass proportion in the raw material and the input energy in the experimental parameters. When the filling volume is 20 % and the thickness is 1.5 mm, the maximum reflection loss is −59.05 dB. When the thickness is 1.4 mm, the effective absorption bandwidth reaches 4.52 GHz, concentrated in the Ku-band. The results show that anchoring FeCo nanoparticles on the surface of graphene nanosheets can regulate the dielectric constant over a wide range at a low filling rate, which can enhance conductive loss, interface polarization and magnetic energy storage capabilities, thereby optimizing impedance matching and loss attenuation.