Shielding properties of carbon nanotubes - Amorphous composite coatings

被引：2

作者：

Feng, Meng ^{[1
]}

Wang, Xinlin ^{[1
]}

Zeng, Min ^{[1
]}

机构：

[1] Cent Iron & Steel Res Inst, Dept Funct Mat, Beijing 100081, Peoples R China

来源：

2008 ASIA-PACIFIC SYMPOSIUM ON ELECTROMAGNETIC COMPATIBILITY AND 19TH INTERNATIONAL ZURICH SYMPOSIUM ON ELECTROMAGNETIC COMPATIBILITY, VOLS 1 AND 2 | 2008年

关键词：

D O I：

10.1109/APEMC.2008.4560021

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

An electric conductive and magnetic permeable composite coating with different mass fractions of multiwalled carbon nanotubes (MWCNTs) and cobalt-base amorphous powder was synthesized for wide frequency electromagnetic interference (EMT) shielding. The results of measurement on surface resistivity and shielding effectiveness (SE) showed that the system percolation threshold is near 40wt% of MWCNTS and 30wt% Of amorphous powder. At this point, surface resistivity is minimum and SE is almost higher than 10dB in the frequencies ranging 100kHz-1.5GHz. From SEM image of coating, it is found that fillers of coating are dispersed well. The amorphous powder of high permeability can improve the low frequency shielding effect of the coating significantly and thus obtained SE is better than that of traditional shielding coatings in low frequency band. Owing to its light weight, low filler concentration and easy processability, the composite coating can promisingly be used as an effective and practical wide frequency EMT shielding material.

引用

页码：899 / 902

页数：4

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