Absorption properties of carbon black/silicon carbide microwave absorbers
Absorption properties of carbon black/silicon carbide microwave absorbers
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DOI：
10.1016/j.compositesb.2010.11.009
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发表时间：
2011-03-01
影响因子：
13.1
通讯作者：
Wu, Youpeng
中科院分区：
文献类型：
--
作者：
Liu, Xiangxuan;Zhang, Zeyang;Wu, Youpeng
采用纳米炭黑（CB）与纳米碳化硅（SiC）共混制备了吸波介质。该介质改善了单一CB吸收剂的吸波性能和波段。利用场发射扫描电镜、三电极法和矢量网络分析仪分别研究了材料的微观结构、导电性能、介电性能和微波吸收性能。结果表明，SiC能降低炭黑/环氧树脂复合材料的逾渗阈值。一定质量的SiC的加入可以提高复合材料的微波吸收性能。当5重量%将炭黑与50重量% SiC制备的复合材料厚度为2 mm时，在9 GHz处的最大反射损耗为-41 dB，-10 dB带宽达到6 GHz。因此。所制备的复合材料具有用于电磁吸收的潜力。(C)2010爱思唯尔有限公司保留所有权利。
An absorbing medium is prepared using nanosize carbon black (CB) blended with nanosize silicon carbide (SiC). The medium improves the wave absorption properties and the wave band of the single CB absorbent. The microstructure, conductivity, dielectric property, and microwave absorption of the material are studied by means of field emission scanning electron microscopy, trielectrode method, and vector network analyzer respectively. The results show that SiC can reduce the percolation threshold of CB/epoxide resin composite. Addition of certain mass of SIC can improve the microwave absorption of the composite. When 5 wt.% carbon black is blended with 50 wt.% SiC to fabricate a composite with a 2 mm thickness, the maximum reflection loss becomes -41 dB at 9 GHz, and the -10 dB bandwidth reaches 6 GHz. Thus. the prepared composite has the potential for use in electromagnetic absorption. (C) 2010 Elsevier Ltd. All rights reserved.