Coupling Fe@Fe3O4 nanoparticles with multiple-walled carbon nanotubes with width band electromagnetic absorption performance
Coupling Fe@Fe3O4 nanoparticles with multiple-walled carbon nanotubes with width band electromagnetic absorption performance
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DOI：
10.1016/j.apsusc.2018.10.148
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发表时间：
2019-02-15
影响因子：
6.7
通讯作者：
Wang, Chengyu
中科院分区：
文献类型：
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作者：
Chen, Cong;Bao, Shouzhen;Wang, Chengyu
为了减少电磁干扰和辐射，有效的途径之一是研制电磁吸收材料，将电磁波高效地转化为热能。目前，高性能电磁吸振器的设计策略主要是通过成分优化和微结构设计来实现。本文报道了一种新型的HWCNTs/Fe@Fe3O4三元吸收剂，该吸收剂是通过在H2 O2处理过的碳纳米管（HCNTs）表面修饰磁性核壳结构的Fe@Fe3O4纳米粒子而制备的。该复合材料表现出导电、偶极子、界面损耗等多种电磁损耗形式，这些电磁损耗形式都是影响复合材料电磁兼容性能的重要因素。通过制备Fe@Fe_3O_4、HCNTs@Fe@Fe_2O_3复合材料进行对比实验，探讨了EMA损耗机理。通过这种方式，可以更好地理解衰减机制。
To reduce electromagnetic interference (EMI) and irradiation, one efficient path is to develop electromagnetic absorption (EMA) material with the aim of high-efficient convert electromagnetic wave into thermal energy. Presently strategy to design high-performance electromagnetic absorber is followed by the way of component optimization and microstructure design. This research reported an advanced HWCNTs/Fe@Fe3O4 ternary absorber, which was fabricated by decorating H2O2 treated carbon nanotubes (HCNTs) with magnetic core-shell shaped Fe@Fe3O4 nanoparticles. This HCNTs/Fe@Fe3O4 composite exhibits various electromagnetic loss forms, including conducive, dipole, interface loss etc. which attribute to EMA ability. The largest qualified frequency width (f(E)) can up to 5.4 GHz with a thickness of 1.5 mm. To discuss the EMA loss mechanism, control experiments have been conducted by preparation of Fe@Fe3O4, HCNTs@Fe@Fe2O3 composites. In this way, the attenuation mechanism can be better understood.