In this paper,FeSe2 was grown on the surface of reduced graphene by solvothermal reaction,and stable FeSe2/RGO composites were prepared.The electromagnetic parameters are measured by vector network analyzer and it is found by calculation that the optimal reflectance is-41.78dB at 7.52GHz when the matching thickness reaches 3mm.It is proved that the composite has good absorption performance in C-band(4～8GHz).It is further indicated that FeSe2/RGO composite material has good electromagnetic wave absorption performance and is an excellent electromagnetic wave absorption material.
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