无纺布织物涂层的吸波性能

以无纺布为基材,采用叠层式结构制备无纺布织物涂层吸波材料。用3 cm波导测量系统在9.35GHz研究复合吸波剂(羰基铁粉和乙炔炭黑)含量和叠层结构对材料吸波性能的影响。结果表明,这种以无纺布为基材的吸波材料,通过控制吸波涂层的组成和设计合理的结构,增加入射电磁波与吸波材料的作用几率,可以改进材料的吸波性能并降低材料面密度。

Study on Microwave Absorbing Properties of Non Woven Fabric Coating

A fabric coating absorbing material(FCAM) with multi-layer structure was prepared on non-woven fabrics.In order to investigate absorption ability,composition(carbonyl iron power and acetylene carbon black at various ratios as absorbing agents) and structure(different multi-layer structures,including superposed directly and inserted fabrics which didn't have absorbing properties) of this absorbing material were respectively studied with 3cm wave-guide method at 9.35GHz.Results show that this multi-layer structure together with absorbing agents has an impact on transmitting route of microwave.Moreover,the electromagnetic waves may occur repeatedly energy dissipation through a series of dispersion,reflection in the multi-layers.As a result,resonance loss may be occurred.Because fabrics used were very light,this FCAM had a lower planar density.