Electromagnetic and microwave absorption properties of single-walled carbon nanotubes and CoFe2O4 nanocomposites

被引：71
|
作者：
Li, Guo
Sheng, Leimei [1 ]
Yu, Liming
An, Kang
Ren, Wei
Zhao, Xinluo
机构：
[1] Shanghai Univ, Dept Phys, Shanghai 200444, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS | 2015年 / 193卷
基金：
中国国家自然科学基金;
关键词：
Microwave absorption; SWCNTs; CoFe2O4; Nanocomposite; ABSORBING PROPERTIES; MAGNETIC-PROPERTIES; COBALT FERRITE; NANOPARTICLES; REMOVAL;
D O I：
10.1016/j.mseb.2014.12.008
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Single-walled carbon nanotubes were facilely and abundantly synthesized by low-pressure air arc discharge method (LPA-SWCNTs), and CoFe2O4 nanocrystals were synthesized by a nitrate citric acid sol-gel auto-ignition method. The electromagnetic and microwave absorption properties of LPA-SWCNTs, CoFe2O4 nanocrystals and their nanocomposites were investigated. The LPA-SWCNT/CoFe2O4 nanocomposites showed excellent microwave absorption properties. The minimum efficient reflection loss is -30.7 dB at 12.9 GHz for 10 wt% of LPA-SWCNTs in the nanocomposites, and an effective absorption bandwidth with a reflection loss below -10 dB is 7.2 GHz. The Debye equation and impedance matching were introduced to explain the microwave absorption properties. Compared with the single-component materials, the LPA-SWCNT/CoFe2O4 nanocomposites are an excellent candidate for microwave absorbers. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：153 / 159
页数：7
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