Preparation and Microwave Absorption Properties of FeCoV/GO/Coupling Agent Composites in S Band

FeCoV alloy/graphene oxide (GO)/coupling agent composites were prepared by the ball-milling method. The microstructure and phase of the composites were detected by scanning electron microscope and x-ray diffraction. The electromagnetic parameters were characterized by the Agilent vector network analyzer in the frequency range of 1–18 GHz. The value of the minimum reflection loss (RL_min) for the FeCoV alloy/GO/coupling agent composites can reach − 17.1 dB at 2.8 GHz with a thickness of 2 mm, accompanied by a bandwidth (<− 10 dB) of 0.8 GHz. The impedance matching properties of the composites were greatly improved by the addition of the coupling agent. The superior absorption properties for the FeCoV/GO/coupling agent composites can be used widely as microwave absorption materials in the S band.