Temperature dependent microwave attenuation behavior for carbon-nanotube/silica composites
Temperature dependent microwave attenuation behavior for carbon-nanotube/silica composites
复制标题
碳纳米管/二氧化硅复合材料的温度依赖性微波衰减行为
DOI：
10.1016/j.carbon.2013.07.110
复制
发表时间：
2013-12-01
期刊：
影响因子：
10.9
通讯作者：
Yuan, Jie
中科院分区：
文献类型：
--
作者：
Wen, Bo;Cao, Mao-Sheng;Yuan, Jie
SiO2基复合材料填充2，5和10重量%制备了多壁碳纳米管（MWCNTs），以在100至500 ℃的宽温度范围内在整个X波段（8.2-12.4 GHz）上评估介电性能和微波衰减性能。基于多壁碳纳米管结构诱导的导电性，讨论了迁移和跳跃电子在多壁碳纳米管微电流网络中的输运，并研究了多壁碳纳米管含量和温度对电子输运和导电性的影响。这些效应对复合材料的介电性能、电磁波传播和微波衰减性能也有很大的影响。CNT基复合材料的电磁屏蔽性能和微波吸收性能为微波衰减材料的设计提供了技术指导，也表明CNT基复合材料在微波衰减领域具有广阔的应用前景。(C)2013爱思唯尔有限公司保留所有权利。
SiO2-matrix composites filled with 2, 5 and 10 wt.% multiwalled carbon nanotubes (MWCNTs) were prepared to evaluate the dielectric properties and microwave attenuation performances over the full X-Band (8.2-12.4 GHz) at a wide temperature ranging from 100 to 500 degrees C. On the basis of the conductivity induced by the structure of the MWCNT, the transport of migrating and hopping electrons in the MWCNT micro-current network has been discussed, and the effects of MWCNT content and temperature on the electronic transport and conductivity have been investigated. These effects also have great influences on the dielectric properties, electromagnetic wave propagating and microwave attenuation performances of the composites. The behavior of electromagnetic interference (EMI) shielding and microwave absorption provide the technical direction for the design of microwave attenuation materials and also indicate that CNT-based composites could be promising candidates for microwave attenuation application. (C) 2013 Elsevier Ltd. All rights reserved.