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Design and preparation of the epoxy resin based composite board with broad-band wave-absorbing properties
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Affiliation:

1.Jiangxi Institute of Ecological Civilization,Nanchang University;2.Institute of Space Science and Technology,Nanchang University

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Fund Project:

National Natural Science Foundation of China (61361008)

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    Abstract:

    In this paper, a sandwich composite with broad-band wave-absorbing properties in C-Band was designed and prepared , and the electromagnetic parameters and reflectivity of the composite board were analyzed by a coaxial cable method and a vector network analyzer. The thickness of the composite laminate is 5 mm, and the surface layer of the board and the bottom layer are the glass fiber/ epoxy resin composite material, and the Fe50Ni50 powders/ butyl rubber nanocomposite is the interlayer. A spherical Fe50Ni50 powders with a particle size of about 100 nm were prepared by a liquid-phase reduction method, and a two-step blending method was used to prepare the Fe50Ni50/ butyl rubber nanocomposite. The result shows that the wave-absorbed mechanism of the interlayer is the magnetic loss in the frequency band of 2-18 GHz . The matching of the surface layer and the interlayer is the key to obtain the broad-band wave-absorbing properties, and the good wave-absorbing properties can be obtained by adjusting the thickness of the surface layer and the interlayer. When the thickness of the composite laminate is 5 mm and the thickness of the interlayer is 2 mm, the wave-absorbing frequency band for R being less than -10 dB, is in the range of5.6 GHz -7.6 GHz and 16.8 GHz -18 GHz, and the width of wave-absorbing band reaches 3.2 GHz, and the wave-absorbing bandwidth in the C-band is 2 GHz, which has achieved a breakthrough.

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[Yuan Zhifen, Zhao Hui, Zhou Jia. Design and preparation of the epoxy resin based composite board with broad-band wave-absorbing properties[J]. Rare Metal Materials and Engineering,2020,49(11):3782~3789.]
DOI:10.12442/j. issn.1002-185X.20190910

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History
  • Received:November 03,2019
  • Revised:November 27,2019
  • Adopted:November 29,2019
  • Online: December 09,2020
  • Published: