Journal of Inorganic Materials ›› 2019, Vol. 34 ›› Issue (4): 407-416.doi: 10.15541/jim20180280

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Comparison of Electromagnetism Behavior of Different Content Cobalt-zinc Ferrite Loaded with Graphene

Zhi-Jun MA,Chang-Ye MANG,Hai-Tao ZHAO,Zhi-Hao GUAN,Liang CHENG   

  1. College of Mining, Liaoning Technical University, Fuxin 123000, China
  • Received:2018-06-22 Revised:2018-10-22 Online:2019-04-20 Published:2019-04-15
  • Supported by:
    National Natural Science Foundation of China(51372108)

Abstract:

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 2θ=9.74° to 24.15° 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.

Key words: graphene, composite materials, cobalt-zinc ferrite, electromagnetic behavior, graphene oxide

CLC Number: 

  • TM277