期刊
CARBON
卷 171, 期 -, 页码 474-483出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2020.09.040
关键词
SiC nanoparticle; Carbon nanofiber; Microwave absorption; Impedance matching; Electrospinning
资金
- National Key R&D Program of China [2017YFB1103500]
- National Natural Science Fund of China [51872230]
The combination of carbon fibers with SiC nanoparticles as microwave absorbers shows excellent absorption performance and flexibility, effectively consuming electromagnetic energy and withstanding various forms of deformation.
Light-weight and flexible microwave absorbers are in increasing demand because of the electromagnetic (EM) pollution. Carbon fiber mats are promising as they have high flexibility and conductivity. However, the high permittivity of the carbon fibers leads to a strong impedance mismatch with free space. Thus, SiC was introduced to carbon fibers as it has an outstanding impedance match with free space. After the decoration of SiC nanoparticles, incident microwaves could penetrate into the SiC decorated carbon (C-SiC) nanofiber mats and be converted into internal energy instead of being reflected. Conductive loss and polarization relaxation loss from the SiC nanoparticles and conductive carbon nanofiber matrix consumed the EM energy. Additionally, the highly flexible carbon fiber matrix could bear the load of bending and twisting, leading to excellent flexibility and reliability. The C-SiC nanofiber mats exhibited a resistance change less than 20% after 200 times bending, and had excellent EM absorbing properties with the RLmin of -53.7 dB at the thickness of 2.15 mm and the effective bandwidth of 7.11 GHz at the thickness of 2.6 mm. The proposed strategy may facilitate the design of highly reliable and flexible carbon based two dimensional (2D) EM absorbers for the broadband wave absorbing. (C) 2020 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据