Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6725611 | Construction and Building Materials | 2013 | 6 Pages |
Abstract
The electromagnetic wave absorbing properties of multi-walled carbon nanotube (MWCNT)/cement composites were studied. The influence of the MWCNT content and sample thickness on the electromagnetic wave reflectivity was discussed and analyzed in the frequency ranges of 2-8Â GHz and 8-18Â GHz. When the MWCNT content is 0.6Â wt.%, the cement mortar sample with a thickness of 25Â mm can remarkably absorb electromagnetic waves close to the absorbing peaks in the frequency range of 2-8Â GHz. The strongest peak with a reflectivity of â28Â dB is obtained at 2.9Â GHz. The cement mortar sample with a thickness of 35Â mm presents beneficial broadband wave absorption performance between 8 and 18Â GHz. The addition of 0.9 Â wt.% MWCNTs can notably enhance the wave absorption performance of the cement mortar and make the bandwidth below â10Â dB reach 7.1Â GHz in the frequency range of 8-18Â GHz.
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Authors
Baomin Wang, Zhiqiang Guo, Yu Han, Tingting Zhang,