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ID:32701421
大小:2.16 MB
页数:61页
时间:2019-02-14
《含不同吸波剂的树脂类复合材料的制备及吸波性能研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、摘要本文用层压法制备了碳纤维/树脂复合吸波材料,对以聚丙烯腈(PAN)基碳纾维、穗胶基活挂羰毡、六角晶系铁氧体及乙姨鼯电碳黑季#为吸波到割冬瓣复合材料的吸波性能做了系统研究,分析了各种吸波剂的作用和吸波枫理。采用反射率弓形测试法测定了材糕约频率特牲曲线。通过矢量分橱仪剩用反射一转簸网终参数法间接测量繇统测定了铁氧体电磁参数。硬究结果表明,复会材辩中乎行扫}匆的碳纾绫含量缀少对,材料具有一定的吸波特性。材料反射衰减与碳纤维排布间距、与入射电磁波矢量夹角有关。当碳纾维/巧襞越黯吸波季才籽中添如少基铁氧体、乙炔导
2、电碳黑等吸波剡可以增加电磁波的磁、电损耗,可以改善单碳纤维/树脂吸波材料的备项异性,获得比重低、瞧能优爨的吸波材料。粘胶基活性碳纤维具有非圆截面及表面丰富的微孔,对电磁波有损耗作用。按照模拟电路感性屏设计的吸波材料最大反射衰减达N-30.7dB,有大于7GHz的吸收带宽。根据不同使用要求分别制各了网4性(热固性环氧树鹏)基体材料和柔性(热辍性聚氯酯)基体材料。复合材料基体成分影响吸波性能。当碳纤维间距大于6n,,m时,环氧树脂基体材料吸波性能优于聚氨酯蒸体材料;碳纤维间距小于4nml时,聚氨酯基体的材辩表现
3、出更好的吸波性能。关键词;吸波率孝料吸波镧辕纤维铰氧体己映谈熏糖胶基活毪酸毽ABSTRACTInthispaper,carbonfiber,resincompositeradarabsorbingmaterials(RAM)werepreparedusinglaminating.Theabsorbingpropertiesofthesecomposites.withpolyacrylonitrile(PAN)baselongcarbonfiber,viscosebasecarbonfiberfelt,hex
4、aferrite,andacetylenecatbonblackasabsorber,wereresearchedsystematically.ThefunctionsandabsorptionmechanicsofvariousabSOrberswereanalyzed.Radarabsorbingmaterial(KAM)reflectivityarchmeasurementwasusedtomeasurematerials’reflectivity.ThecomplexpermiRivityandpe
5、rmeabilityofsoliddielectricmaterialsatmicrowavefrequenciesWaSmeasuredusingreflection—transmissionnetworkparametermethodbyvectorlyser.Astheresults,smallamountofcarbonfiberinresinmadematerialshavemicrowaveabsorptionproperties.ThereflectionlOSSfRLlofthesemate
6、rialsWaSconcemedtOcarbonfiber’Sdistancefd、andtheanglebetweencarbonandinputelectromagneticwave.ImputingaliRlebithexaferriteoracetylenecarbonblackincarbonfiber/resincompositeCanmakeuptheanisotropyinducedbysimplecarbonfiber.RAMswhichhadlowdensityandchampionab
7、sorbingpropertiesweremadebythisway.Viscosebasecarbonfiberhasnon—circularcrosssectionandabundantmicroporesinitssurface.Thesemadespecialcontributiontoelectromagneticreflectionlosing.Accordingtocircuitanalogymaterials,inductivecircuitscreenabsorbingcompositeu
8、singviscosebaSecarbonfiberfeltwasmade.Amaximumreflectionlossof—-30.7dBandover7GHzbandwidthwereobtainedforcompositewithc/a。O.75andepoxymatrix.Accordingtodifferentoperatingrequirements,rigidRAM(thermosettingepo
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