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论文类型：期刊论文

发表时间：2011-05-15

发表刊物：PHYSICA B-CONDENSED MATTER

收录刊物：SCIE、EI

卷号：406

期号：11

页面范围：2261-2265

ISSN号：0921-4526

关键字：FeSi powders; Particle size; Electromagnetic parameters; Microwave absorption

摘要：The electromagnetic and microwave absorption properties of the composites employing FeSi alloy powders with different particle sizes as absorbent and paraffin as matrix were investigated. The results showed that the particle size had significant influence on the electromagnetic and microwave absorption properties of the composites in the 2-7 GHz frequency range. By decreasing the particle size of FeSi alloy powders, both the complex permittivity and permeability of the composites increased to a certain extent. In addition, the microwave absorption properties were improved, and the frequency of absorption peak shifted towards lower frequency range. In other words, the micron-grade FeSi alloy powders with smaller particle size were more suitable to be used as absorbent in measured frequency region. (C) 2011 Elsevier B.V. All rights reserved.