Research progress of SiC composite microwave absorbing materials

In order to prevent the increasingly serious electromagnetic interference problem, the research and development of microwave absorbing materials has attracted more and more attention. As a microwave absorbing material with excellent dielectric properties, SiC also has the advantages of excellent stability, high strength and corrosion resistance. But it also has the disadvantages of poor impedance matching and single microwave absorbing mechanism. Compounding SiC with other materials is an important means to further improve the microwave absorbing properties of SiC materials. The structure, microwave absorbing mechanism and influencing factors of SiC were briefly introduced in the paper. Then the microwave absorbing properties of SiC composites with different dimensions were summarized in detail, including SiC nanoparticles, SiC nanowires, three-dimensional SiC materials with different kinds of materials such as metallic materials, carbon materials, ceramic materials, and polymer materials. Compared with a single SiC material, the composite materials can improve their dielectric properties, enrich the absorption mechanism, optimize the impedance matching, and then improve the microwave absorption ability. Finally, the development direction of SiC based composite microwave absorbing materials was prospected.