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以碳纳米管(CNT)和四针状纳米氧化锌(NT-ZnO)混合物作为吸收剂、环氧树脂(EP)为黏结剂制备吸波涂层,研究不同CNT和NT-ZnO含量对吸波性能的影响.采用三次刷涂后,发现当CNT含量达到12%,NT-ZnO的含量为8%、涂层厚度为1·5mm时,吸波涂层的最小反射率为-23·07dB,小于-10dB的吸波带宽为5GHz,涂层的面密度2kg/m2·复合涂层的吸波性能比纯CNT和纯NT-ZnO涂层有显著的提高,并对其吸波机理进行了分析.
The absorption coating was prepared by using carbon nanotubes (CNTs) and NT-ZnO as absorbent and epoxy resin (EP) as binder to study the effects of CNTs and NT-ZnO content on wave absorption The results show that when the CNT content reaches 12%, the content of NT-ZnO is 8% and the thickness of the coating is 1 · 5mm, the minimum reflectivity of the absorbing coating is -23 · 07dB, The absorption bandwidth of less than -10dB is 5GHz, and the areal density of the coating is 2kg / m2. The microwave absorption performance of the composite coating is significantly higher than that of pure CNT and pure NT-ZnO coating, and the wave absorption mechanism is analyzed .