摘要
在聚丙烯腈(PAN)聚合液中分别加入Fe,nano-Fe和FeC2O4.2H2O,经热处理后制备了三种新型的电磁损耗型碳基复合吸波材料。通过X射线衍射仪(XRD)对复合材料分别进行物相分析,三种复合材料中,Fe元素主要以Fe3O4的形式存在。根据所测得的介电常数和磁导率比较分析了三种碳基复合材料和纯碳材料的吸波性能,结果表明加入Fe和nano-Fe制备的碳基复合材料有效改善了纯碳材料的输入波阻抗匹配程度,提高了微波吸收性能。结果表明,加入Fe和nano-Fe制备的碳基复合材料,涂层厚度分别为1.9和2.2mm时,在12.7～18GHz频段内,反射损失值都小于-10dB,有效吸收带宽为5.3GHz。涂层厚度均增至2.5mm,最小反射损失值分别达到-46和-29.8dB,有效改善了纯碳基体输入波阻抗匹配程度,提高了微波吸收性能。
Three novel carbon based composites were prepared by using Fe,nano-Fe,FeC2O4（2H2O and polyacrylonitrile（PAN） as precursors respectively.The phase composition of the composites was analyzed by X-ray diffraction.Electromagnetic and microwave absorption properties of the composites and pure carbon material were investigated in the frequency range of 2~18 GHz.The results show that C and Fe3O4 are the chief components,and the reflection loss values of below-10dB were achieved in the frequency range of 12.7~18 GHz with thicknesses were 1.9 and 2.2mm,for the composites using Fe and nano-Fe as precursors,respectively.When the thickness increased to 2.5MM,the minimum reflection loss value of-46 and-29.8 dB were observed.It indicates that the composites can improve the impedance matching and the microwave absorption capability of the carbon matrix.
出处
《航空材料学报》
EI
CAS
CSCD
北大核心
2012年第1期63-67,共5页
Journal of Aeronautical Materials
基金
国际科技合作资助项目(2009DFR50600)
国家"973"计划项目(2011CB605601)
关键词
四氧化三铁
碳基复合材料
介电常数
磁导率
微波吸收
ferroferric oxide
carbon based composites
permittivity
permeability
microwave absorption
