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论文类型：期刊论文

发表时间：2010-11-15

发表刊物：APPLIED SURFACE SCIENCE

收录刊物：SCIE、EI、Scopus

卷号：257

期号：3

页面范围：842-846

ISSN号：0169-4332

关键字：Coating; Carbonyl-iron powder; Carbon black; Electromagnetic parameter; Microwave absorption

摘要：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.