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一种具有宽频吸波性能的环氧树脂基夹层复合板设计与制备
作者:
作者单位:

1.南昌大学 江西生态文明研究院;2.南昌大学空间科学与技术研究院

基金项目:

国家自然科学基金


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

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

Fund Project:

National Natural Science Foundation of China (61361008)

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    摘要:

    本文设计和制备了一种在C波段上具有宽频吸波性能的夹层复合材料,并用同轴电缆法和矢量网络分析仪分析了复合材料板的电磁参数和反射率。复合材料板厚度5mm,板表层与底层为玻璃纤维/环氧树脂复合材料,以“Fe50Ni50粉体/丁基橡胶纳米复合材料”为中间夹层。采用液相还原法制备了粒径约为100nm的球形Fe50Ni50粉末,采用二步共混法制备了Fe50Ni50 /IIR复合材料。研究表明, Fe50Ni50粉体/IIR纳米复合材料在2~18GHz频带上以磁损耗为主。表层与夹层的匹配是获得宽频吸波特性的关键,可以通过调整表层与夹层的厚度获得良好的吸波性能。当复合材料板厚度为5mm、夹层厚度为2mm时,板的R≤-10dB的吸波频带为5.6GHz~7.6GHz和16.8GHz~18GHz,吸波带宽达到3.2GHz,该材料在C波段吸波带宽达到2GHz,取得了突破。

    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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袁志芬,赵辉,周佳.一种具有宽频吸波性能的环氧树脂基夹层复合板设计与制备[J].稀有金属材料与工程,2020,49(11):3782~3789.[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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  • 收稿日期:2019-11-03
  • 最后修改日期:2019-11-27
  • 录用日期:2019-11-29
  • 在线发布日期: 2020-12-09