Microwave absorption properties of a wave-absorbing coating employing carbonyl-iron powder and carbon black
Microwave absorption properties of a wave-absorbing coating employing carbonyl-iron powder and carbon black
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DOI：
10.1016/j.apsusc.2010.07.078
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发表时间：
2010-11-15
影响因子：
6.7
通讯作者：
Yu, Zhen
中科院分区：
文献类型：
--
作者：
Liu, Lidong;Duan, Yuping;Yu, Zhen
为了防止严重的电磁干扰，采用羰基铁粉（CIP）和炭黑（CB）复合吸收剂，以环氧树脂为基体制备了单层吸波涂料。用扫描电镜（SEM）和透射电镜（TEM）对CIP和CB的形貌进行了表征。采用透射/反射技术在2-18 GHz频率范围内测量了CIP和CB的电磁参数，并分别讨论了两种粒子的电磁损耗机理。用拱形法测量了涂层的反射损耗，研究了涂层的吸波性能。讨论了炭浆比、炭黑含量和厚度对复合材料吸波性能的影响。结果表明，厚度、CIP或CB含量越高，吸收带越向低频方向移动。值得注意的是，通过控制复合材料中CIP或CB的含量，可以根据实际需要在不同的频率范围内应用吸波涂层。(C)2010 Elsevier B. V.保留所有权利。
To prevent serious electromagnetic interference, a single-layer wave-absorbing coating employing complex absorbents composed of carbonyl-iron powder (CIP) and carbon black (CB) with epoxy resin as matrix was prepared. The morphologies of CIP and CB were characterized by scanning electron microscope (SEM) and transmission electron microscope (TEM), respectively. The electromagnetic parameters of CIP and CB were measured in the frequency range of 2-18 GHz by transmission/reflection technology, and the electromagnetic loss mechanisms of the two particles were discussed, respectively. The microwave absorption properties of the coatings were investigated by measuring reflection loss (RL) using arch method. The effects of CIP ratio, CB content and thickness on the microwave absorption properties were discussed, respectively. The results showed that the higher thickness, CIP or CB content could make the absorption band shift towards the lower frequency range. Significantly, the wave-absorbing coating could be applied in different frequency ranges according to actual demand by controlling the content of CIP or CB in composites. (C) 2010 Elsevier B.V. All rights reserved.