▎ 摘　　要

New electromagnetic microwave absorption materials not only require strong absorption capacity and wide absorption frequency but also lightweight and thin thickness. "Wide, strong, light, and thin" is the overall goal of the current research on electromagnetic microwave absorption materials. Therefore, both human survival and the need for military equipment are encouraging researchers to develop new high-performance electromagnetic microwave absorption materials. A FeCo/GO composite has been successfully fabricated by a two-step method. Various devices were applied to separately measure the structural characteristics, microscopic morphology, and properties of the composite. The results demonstrate that the electromagnetic microwave absorption of the FeCo/GO composite is excellent. At a frequency of 10.7 GHz, the maximum reflection loss (RLmax) value is - 39.2 dB, the effective bandwidth of RLmax less than - 10 dB is 3.8 GHz (8.6-12.4 GHz), and the thickness is 5.0 mm. The electromagnetic microwave absorption performance and impedance matching of the FeCo/GO composite is superior to that of single materials, which can be explained in detail by the electromagnetic microwave absorption mechanism. Thus, it can be observed that the FeCo/GO composite is a promising electromagnetic microwave absorber in future high-performance materials.