Synthesis and high-performance electromagnetic wave absorption of SiC@C composites

A kind of simple binary composites of SiC@C were prepared via high temperature carbothermal reduction method, and their structure, composition and electromagnetic property were characterized. Results showed that the SC-2 composite was optimal and the RLmin was up to −39.2 dB at 16.4 GHz with the thickness of 1.5 mm and the effective bandwidth (RL ≤ −10 dB) covered the whole frequency range of 10-18 GHz. In addition, the thickness, RLmin and effective bandwidth of absorber can be controlled just by changing the carbon content of composites, which makes the composites rather promising application in electromagnetic wave absorption field.