Co_(3)O_(4)/MWCNTs/GO复合材料的制备及其低频吸波特性的研究  

Preparation of Co_(3)O_(4)/mwcnts/go Composites and Study on Their Low Frequency Microwave Absorption Characteristics

作　　者：伊浩天 Yi Haotian(Nankai University,Tianjin,300071)

机构地区：[1]南开大学,天津300071

出　　处：《当代化工研究》2022年第15期138-141,共4页Modern Chemical Research

摘　　要：文章构建了一种基于一步水热法制备的Co_(3)O_(4)/MWCNTs/GO纳米复合吸波材料,可在0.1~3.0GHz的低频波段下通过介电损耗和磁损耗的耦合作用展现出优异的吸波性能。进一步探讨机理可知,碳纳米管和镶嵌的石墨烯产生的偶极化和界面极化使材料的介电损耗得以加强,而磁损耗主要源自于纳米粒子自身的自然共振。在这些因素的协同作用下,厚度为5mm时材料的最大反射损耗率在0.39GHz处达到了-42.56dB,厚度为2mm时材料的有效吸波范围可覆盖0.77~1.99GHz。这表明该新型纳米复合材料在吸收低频电磁波方面具有巨大的应用潜力。In this paper,a Co_(3)O_(4)/mwcnts/go nanocomposite microwave absorbing material prepared by one-step hydrothermal method is constructed,which can exhibit excellent microwave absorbing properties through the coupling effect of dielectric loss and magnetic loss in the low frequency band of 0.1~3.0 GHz.Further discussion of the mechanism shows that the coupling polarization and interface polarization produced by carbon nanotubes and embedded graphene strengthen the dielectric loss of the material,and the magnetic loss mainly comes from the natural resonance of the nanoparticles themselves.Under the synergistic effect of these factors,the maximum reflection loss rate of the material reaches-42.56 dB at 0.39 GHz when the thickness is 5 mm,and the effective absorption range of the material can cover 0.77~1.99 GHz when the thickness is 2 mm.This shows that the new nanocomposites have great application potential in absorbing low-frequency electromagnetic waves.

关 键 词：吸波特性 钴氧化物 石墨烯 多壁碳纳米管 

分 类 号：TQ[化学工程]