For expanding the application field of grahene, electromagnetic wave absorption performance of the magnetic functionalization graphene has been researched in this paper. Graphene/Fe3O4 nanoparticle composites are prepared by microwave irradiating the suspension of graphite oxide and Fe3O4 in the presence of hydrazine hydrate. Transmission electron microscopy and X-ray diffraction are used to characterize the structure and the distribution condition of the composites. Vector network analyzer is used to measure the complex permittivity and complex permeability of the composites in the frequency range of 0.1-18.0 GHz. The permittivity dispersion behaviors are explained based on the Cole-Cole model. The reflection loss curves are calculated using computer simulation technique. Calculation results from the complex permittivity and permeability show that when the mass ratio of graphene to Fe3O4 is 10∶1, reflection losses exceeding -20 dB can be obtained in the frequency range of 6.5-8.7 GHz for absorber thicknesses of 2.0-2.5 mm. By changing the relative content of the Fe3O4 nanoparticles, minimum reflection loss can be obtained at -49.7 dB. Strong absorption properties of the composites indicate its potentially application as electromagnetic wave absorption material.
LI Guoxian, WANG Tao, XUE Hairong, HU Yuanyuan, HE Jianping
. Synthesis of Graphene/Fe3O4 Composite Materials and Their Electromagnetic Wave Absorption Properties[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2011
, 32(9)
: 1732
-1739
.
DOI: CNKI:11-1929/V.20110616.1728.002
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