Heat-conducting wave-absorbing material with 3D conduction network structure and preparation method and application of heat-conducting wave-absorbing material

The invention discloses a heat-conducting and wave-absorbing material with a 3D conduction network structure and a preparation method and application thereof, and belongs to the technical field of heat conduction and wave absorption. The heat-conducting wave-absorbing material is a C-coated Co composite microsphere with a 3D conductive network structure formed by carbon nanofibers and magnetic Co nanoparticles, and is prepared by adopting an ionic crosslinking freeze-drying-annealing process. The structure and the formation mechanism are novel, and 3D conductive network structure microspheres with different phases, textures and compositions of magnetic materials can be prepared by changing the doping concentration of cobalt. The preparation method disclosed by the invention is simple to operate, the product is novel in morphology and excellent in heat conduction and wave-absorbing/shielding performance, the defects of harsh reaction conditions, difficulty in regulation and control of reaction product texture