Carbon nanotubes filled with ferromagnetic alloy nanowires: Lightweight and wide-band microwave absorber
Carbon nanotubes filled with ferromagnetic alloy nanowires: Lightweight and wide-band microwave absorber
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DOI：
10.1063/1.3042099
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发表时间：
2008-12-01
影响因子：
4
通讯作者：
Wu, Dehai
中科院分区：
文献类型：
--
作者：
Lv, Ruitao;Kang, Feiyu;Wu, Dehai
以三氯苯为碳源，制备了不同铁磁性合金(FeCo、FeNi和FeCoNi)纳米线填充的薄壁碳纳米管。将它们分散到环氧树脂中，然后涂覆在180×180 mm(2)的铝基上，形成厚度为2.0 mm的微波吸收涂层。当涂层中含有1.3wt%的FeCo填充碳纳米管时，涂层在5~18 GHz范围内的反射损耗大于-5分贝。在15.2 GHz频段，FeCoNi填充碳纳米管/环氧涂层的最小反射损耗值为-28.2分贝。涂层的面密度仅为2.35 kg/m(2)，有利于低密度要求的应用。
Thin-walled carbon nanotubes (CNTs) filled with different ferromagnetic alloy (FeCo, FeNi, and FeCoNi) nanowires were prepared by using trichlorobenzene as carbon precursor. They were dispersed into epoxy resin and then coated onto 180x180 mm(2) aluminum substrates to form microwave-absorption coatings with 2.0 mm thickness. Re'ection loss exceeding -5 dB was obtained between 5 and 18 GHz for coating containing 1.3 wt % FeCo-filled CNTs. A minimum re'ection loss value of -28.2 dB was achieved at 15.2 GHz in FeCoNi-filled CNTs/epoxy coating. The areal densities of coatings are only 2.35 kg/m(2), which is favorable for the applications requiring low density.