Reflectivity of carbon-fiber-reinforced cement-based composites against electromagnetic waves

Kezhi Li, Chuang Wang, Hejun Li, Fa Luo, Dangshe Hou

科研成果: 期刊稿件文章同行评审

16 引用 (Scopus)

摘要

Carbon-fiber-reinforced cement-based composites were prepared and their fracture surfaces were observed by scanning electron microscopy. The reflectivities of the composites in the frequency ranges of 4-8 GHz and 8-18 GHz were measured by using the Naval Research Laboratory testing system to assess the electromagnetic interference through investigating the influence of carbon fiber contents of 0.2, 0.4, 0.6, 0.8, 1.0 wt% on their reflectivities. Results showed that all of the measured reflectivities data were less than -10 dB in the lower frequency range and there was mainly absorption of electromagnetic waves. However, the reflectivity was more than -10 dB when the fiber mass fraction was over 0.6% in the higher frequency range, and the electromagnetic waves were mainly reflected. As the mass fraction increased, the reflectivity changed. The minimum reflectivity in the lower frequency range was -15.1 dB when the mass fraction was 0.6%, whereas that in the higher frequency range was -19.3 dB when the mass fraction was 0.4%.

源语言英语
页(从-至)1702-1708
页数7
期刊Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
36
10
出版状态已出版 - 10月 2007

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