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Tailored design ofp-phenylenediamine functionalized graphene decorated with cobalt ferrite for microwave absorption

机译：用Cobalt铁氧体装饰的P-Phenylenyi金属官能化石墨烯的定制设计用于微波吸收

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摘要

Structural design and componential optimization are two primary directions in the study of microwave absorbers. In this study, a novel cobalt ferrite (CoFe2O4) decorated withp-phenylenediamine (PPD) functionalized graphene (PG/CoFe2O4) binary hybrid with unique hierarchical porous structure was synthesized by a two-step route. The chemical composition, morphology and electromagnetic parameters of the as-prepared sample were investigated successively. The porous CoFe(2)O(4)microspheres with an average diameter of about 160 nm were uniformly anchored on rGO nanosheets. Owing to the uniquely hierarchical porous structure, synergistic effects of dielectric loss (conductive loss, interface and dipole polarization) and magnetic loss (eddy current loss, natural and exchange resonance), the as-prepared sample exhibited excellent microwave absorption (MA) performance. The maximum reflection loss (RLmax) could attain up to -53.3 dB, and the effective absorption bandwidth (EAB) reached 6.6 GHz (11.4-18.0 GHz) at 2.40 mm, which completely covered theK(u)band. These results showed that this functional material can be applied in the MA field.
机译：结构设计和成分优化是微波吸收器研究中的两个主要方向。在该研究中，通过两步途径合成了用独特的分层多孔结构的用诸如苯二胺（PPD）官能化石墨烯（PG / COFE2O4）二元杂种的新型钴铁氧体（COFE2O4）。连续研究了AS制备样品的化学成分，形态和电磁参数。平均直径为约160nm的多孔砂面（2）O（4）微球均匀锚定在RGO纳米片上。由于该独特的分级多孔结构，介电损耗（导电性损失，接口和偶极极化）和磁损失（涡电流损失，天然和交换共振）的协同作用，所制备的样品显示出优异的微波吸收（MA）的性能。最大反射损耗（RLMAX）可以达到高达-53.3dB，有效的吸收带宽（EAB）达到6.6 GHz（11.4-18.0GHz），在2.40毫米，完全覆盖了THE（U）频段。这些结果表明，该功能材料可应用于MA场。

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  • 来源
    《RSC Advances》 |2020年第53期|共8页
  • 作者

    Ma Tao; Cui Yu; Liu Li; Luan Hao; Ge Jianwen; Ju Pengfei; Meng Fandi; Wang Fuhui;

  • 作者单位

    Northeastern Univ Shenyang Natl Lab Mat Sci Shenyang 110819 Peoples R China;

    Chinese Acad Sci Inst Met Res Shenyang 110016 Peoples R China;

    Northeastern Univ Shenyang Natl Lab Mat Sci Shenyang 110819 Peoples R China;

    Northeastern Univ Shenyang Natl Lab Mat Sci Shenyang 110819 Peoples R China;

    Northeastern Univ Shenyang Natl Lab Mat Sci Shenyang 110819 Peoples R China;

    Shanghai Aerosp Equipment Mfg Shanghai 200245 Peoples R China;

    Northeastern Univ Shenyang Natl Lab Mat Sci Shenyang 110819 Peoples R China;

    Northeastern Univ Shenyang Natl Lab Mat Sci Shenyang 110819 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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