▎ 摘　　要

A kind of graphene composite (rGO/Co0.5Zn0.5Fe2O4) was synthesized with the graphene oxide (GO) prepared from natural flake graphite and cobalt-zinc ferrite (Co0.5Zn0.5Fe2O4) manufactured by the hydrothermal method. The structure of composites was characterized by X-ray diffraction (XRD), Raman spectrometer (Raman) and the Fourier-transform infrared spectroscopy(FT-IR). Morphology, electromagnetic loss properties, Debye relaxation, and microwave absorbing properties of rGO/Co0.5Zn0.5Fe2O4 were investigated by transmission electron microscope (TEM) and vector network analyser (VNA). Sharp peak of graphene oxide was changed from 2 theta=9.74 degrees to 24.15 degrees in the XRD patterns and the oxygen functional group disappeared after the composite reaction, which demonstrated that GO was successfully reduced to rGO. The graphene was embedded with cobalt-zinc ferrite, observed by transmission electron microscope, with its dispersion worse with the loaded Co0.5Zn0.5Fe2O4 increasing. Absorbing property of rGO/Co0.5Zn0.5Fe2O4 composite prepared with w(Co0.5Zn0.5Fe2O4) : w(GO)=2 : 1 is the best with the minimum reflectivity of -36.89 dB at 15.11 GHz and the effective absorption frequency bandwidth of 3.74.