分别以短切碳纤维(添加环氧树脂)膜和轻质闭孔聚乙烯泡棉作为电阻层和无损间隔层,通过将短切纤维树脂膜粘接在聚乙烯泡棉上,制备具有Salisbury Screen结构的雷达吸波材料。通过测试材料的反射率,研究吸收剂含量和泡棉厚度对材料吸波性能的影响规律。结果表明,当短切碳纤维含量为0.3%(wt,质量分数),聚乙烯泡棉厚度为3mm时,材料在8G~18GHz的吸波性能最优,其最大反射率可达-26.9dB。
A short carbon fibers(CF) epoxy resin(EP) film as a resistive sheet and the lightweight closed-cell polyethylene(PE) foam was used as a spacer,then adhered the short CF/EP film upon the foam to form the Salisbury Screen structure radar absorbing materials.The reflectivity of radar absorbing materials was measured to study the effect that the content of short CF and thickness of PE foam on the absorbing performance.The results shown that when the content of short CF was 0.3wt% and the thickness of PE foam was 3mm,the material had the best radar-wave absorption performance in 8G~18GHz,and the max reflectivity was -26.9dB.
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