Microwave-absorbing properties of Co-filled carbon nanotubes

被引：116

作者：

Lin, Haiyan ^{[1
]}

Zhu, Hong ^{[1
]}

Guo, Hongfan ^{[1
]}

Yu, Liufang ^{[1
]}

机构：

[1] Beijing Jiaotong Univ, Sch Sci, Beijing 100044, Peoples R China

来源：

MATERIALS RESEARCH BULLETIN | 2008年 / 43卷 / 10期

基金：

中国国家自然科学基金;

关键词：

nanostructures; chemical synthesis; electron microscopy; dielectric properties;

D O I：

10.1016/j.materresbull.2007.10.016

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Co-filled carbon nanotubes composites were synthesized via using a simple and efficient wet chemistry solution method. The samples were charactefized by transmission electron microscopy. Microwave-absorbing properties were investigated by measuring complex permittivity and complex permeability of the absorber in a frequency range of 2-18 GHz. The reflection loss (R.L.), matching frequency (f(m)) and matching thickness (d(m)) were calculated using the theory of the absorbing wall. The electromagnetic properties and microwave-absorbing characteristics effects of the modified carbon nanotubes by the encapsulation of metal Co were investigated. A matching thickness is found corresponding to a matching frequency. The maximum reflection loss is about -39.32 dB and the bandwidth corresponding to the reflection loss below -10 dB is 3.47 GHz. With increasing thickness, the maximum reflection loss shifts to lower frequency. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：2697 / 2702

页数：6

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