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Electromagnetic and microwave absorption properties of single-walled carbon nanotubes and CoFe_2O_4 nanocomposites

机译:单壁碳纳米管和CoFe_2O_4纳米复合材料的电磁和微波吸收特性

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摘要

Single-walled carbon nanotubes were facilely and abundantly synthesized by low-pressure air arc discharge method (LPA-SWCNTs), and CoFe_2O_4 nanocrystals were synthesized by a nitrate citric acid sol-gel auto-ignition method. The electromagnetic and microwave absorption properties of LPA-SWCNTs, CoFe_2O_4 nanocrystals and their nanocomposites were investigated. The LPA-SWCNT/CoFe_2O_4 nanocomposites showed excellent microwave absorption properties. The minimum efficient reflection loss is -30.7dB at 12.9GHZ for 10wt% of LPA-SWCNTs in the nanocomposites, and an effective absorption bandwidth with a reflection loss below -lOdB 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/CoFe_2O_4 nanocomposites are an excellent candidate for microwave absorbers.
机译:利用低压空气电弧放电法(LPA-SWCNTs)可以简便,大量地合成单壁碳纳米管,并通过硝酸柠檬酸溶胶-凝胶自燃法合成CoFe_2O_4纳米晶体。研究了LPA-SWCNT,CoFe_2O_4纳米晶体及其纳米复合材料的电磁吸收特性。 LPA-SWCNT / CoFe_2O_4纳米复合材料表现出优异的微波吸收性能。对于纳米复合材料中10wt%的LPA-SWCNT,在12.9GHZ时,最小有效反射损耗为-30.7dB,反射损耗低于-10dB的有效吸收带宽为7.2 GHz。介绍了德拜方程和阻抗匹配来解释微波吸收特性。与单组分材料相比,LPA-SWCNT / CoFe_2O_4纳米复合材料是微波吸收剂的极佳候选材料。

著录项

  • 来源
    《Materials Science and Engineering》 |2015年第3期|153-159|共7页
  • 作者单位

    Department of Physics, and Institute of Low-dimensional Carbons and Device Physics, Shanghai University, Shanghai 200444, PR China;

    Department of Physics, and Institute of Low-dimensional Carbons and Device Physics, Shanghai University, Shanghai 200444, PR China;

    Department of Physics, and Institute of Low-dimensional Carbons and Device Physics, Shanghai University, Shanghai 200444, PR China;

    Department of Physics, and Institute of Low-dimensional Carbons and Device Physics, Shanghai University, Shanghai 200444, PR China;

    Department of Physics, and Institute of Low-dimensional Carbons and Device Physics, Shanghai University, Shanghai 200444, PR China;

    Department of Physics, and Institute of Low-dimensional Carbons and Device Physics, Shanghai University, Shanghai 200444, PR China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Microwave absorption; SWCNTs; CoFe_2O_4; Nanocomposite;

    机译:微波吸收;碳纳米管;CoFe_2O_4;纳米复合材料;

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