Electromagnetic and microwave absorption properties of single-walled carbon nanotubes and CoFe2O4 nanocomposites
Electromagnetic and microwave absorption properties of single-walled carbon nanotubes and CoFe2O4 nanocomposites
复制标题
单壁碳纳米管与CoFe2O4纳米复合材料的电磁和微波吸收性能
DOI：
10.1016/j.mseb.2014.12.008
复制
发表时间：
2015-03-01
影响因子：
3.6
通讯作者：
Zhao, Xinluo
中科院分区：
文献类型：
--
作者：
Li, Guo;Sheng, Leimei;Zhao, Xinluo
采用低压空气弧放电法(LPA-SWCNTs)制备了单壁碳纳米管，采用硝酸-柠檬酸溶胶-凝胶自点火法制备了CoFe2O4纳米晶。研究了LPA-SWCNTs、CoFe2O4纳米晶及其纳米复合材料的电磁和微波吸收性能。LPA-SWCNT/CoFe2O4纳米复合材料具有优异的微波吸收性能。对于10wt%的LPA-SWCNT纳米复合材料，在12.9 GHz处的最小有效反射损耗为-30.7分贝，反射损耗小于-10分贝的有效吸收带宽为7.2 GHz。利用德拜方程和阻抗匹配理论对材料的微波吸收特性进行了解释。与单组分材料相比，LPA-SWCNT/CoFe2O4纳米复合材料是一种性能优良的吸波材料。(C)2014爱思唯尔B.V.保留所有权利。
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.