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Microwave absorption properties of carbon fiber radar absorbing coatings prepared by water-based technologies

机译：水性技术制备的碳纤维雷达吸收涂层的微波吸收特性

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Carbon fiber radar absorbing coatings (CFRACs), composed of different amounts of carbon fiber (CF) embedded in polyurethane resin, were prepared using water-based technologies. The microstructures and properties of the coatings were characterized by means of scanning electron microscopy, differential scanning calorimetry, Fourier infrared spectrometry, X-ray diffraction analysis, and vector network analysis. Our results show that with an increase in CF content and thickness of coating, the peak reflection of the CFRAC moved in the low frequency direction. When the CF content was 0.8 wt% and the thickness of the coating was 1.2 mm, the maximum reflection losses of the coatings were ?11.01 dB over the frequency range of 8–18 GHz, with a less than ?10 dB (over 90% microwave absorption) bandwidth of nearly 4.2 GHz and a coating density of 1.02 kg m?2. The results indicated that CFRACs could be a potential microwave absorbing material used over the frequency range of 8–18 GHz.
机译：碳纤维雷达吸收涂层（CFRAC）是由水性技术制备的，该涂层由嵌入聚氨酯树脂中的不同数量的碳纤维（CF）组成。通过扫描电子显微镜，差示扫描量热法，傅立叶红外光谱法，X射线衍射分析和矢量网络分析对涂层的微观结构和性能进行表征。我们的结果表明，随着CF含量和涂层厚度的增加，CFRAC的峰值反射沿低频方向移动。当CF含量为0.8 wt％且涂层厚度为1.2 mm时，在8–18 GHz频率范围内，涂层的最大反射损耗为〜11.01 dB，小于10dB（超过90％）微波吸收）带宽接近4.2 GHz，涂层密度为1.02 kg m ？2 。结果表明，CFRACs可能是在8–18 GHz频率范围内使用的潜在微波吸收材料。

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