碳纳米管吸波性能研究

Investigation on Radar Absorbing Properties of Carbon Nanotube

碳纳米管和环氧树脂混合制成复合吸波涂料,浇铸在铝板上制成吸波涂层。用TEM检测碳纳米管,反射率扫频测量系统HP8757E标量网络分析仪检测吸波性能。碳纳米管和环氧树脂比例为 1: 100时, 7mm厚吸波层试样在 11GHz和 17. 83GHz出现双吸波峰,最大吸波峰出现在 17. 83GHz,峰值R为 9. 04dB,带宽约 1GHz(R< 8dB)。吸波涂层厚度不变,碳纳米管和环氧树脂比例调整为 8: 100时,双吸波峰出现在 10. 08GHz和 16. 80GHz,带宽分别达到 2. 87GHz和 2. 56GHz,总带宽 5. 43GHz(R< 8dB)。当R< 5dB,带宽达到 11. 20GHz。最大吸波峰出现在 10.08GHz,峰值加大到R为 21. 08dB。

Carbon nanotubes were blended with epoxy resin to prepare composite radar absorbing material (RAM). The polymer composite paste was put into an aluminium plate to form the sample. Carbon nanotubes were characterized by TEM, and radar absorbing properties were detected by RAM measuring system of arch method reflectivity. The double absorbing peaks of the sample with 7 mm thickness were obtained when the ratio of carbon nanotubes and epoxy resin was 1:100. The maximum waves absorbing peak of the sample obtained was -9.04 dB at 17.83 GHz and had a bandwidth of 1 GHz (R less than or equal -8 dB). When the ratio was 8:100, the maximum waves absorbing peak of the sample with 7 mm thickness obtained was -21.08 dB at 10.08 GHz and had bandwidths of 5.43 GHz (R>-8 dB) and 11.20 GHz (R less than or equal -5 dB).