碳纤维/普鲁士蓝/ Fe3O4基有损晶格超材料的超薄宽带微波吸收的多尺度集成设计与制造,Journal of Materials Chemistry C

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碳纤维/普鲁士蓝/ Fe3O4基有损晶格超材料的超薄宽带微波吸收的多尺度集成设计与制造
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2021-3-22 , DOI: 10.1039/d1tc00511a
Yuexuan Li _{1,

2,

3,

4,

5} , Yugang Duan _{1,

2,

3,

4,

5} , Xiaoqing Kang _{1,

2,

3,

4,

5}

Affiliation

微波吸收材料（MAM）是应用于隐形技术和电磁干扰（EMI）的专业复合材料。但是，由于与外部空气和单一吸收性填料的阻抗不完美匹配，很难满足超薄和宽带的要求。在此，通过集成设计和制造，实现了低浓度的短碳纤维（SCF）/普鲁士蓝（PB）/ Fe ₃ O ₄ /环氧树脂（EP）基蝶形超材料（BSM）吸收剂的超薄和宽带化。。这表明SCF / PB / Fe ₃ O ₄之间的协同作用/ EP MAM具有BSM吸收器周期性周期的介电磁行为和物理共振损耗，对于改善电磁吸收性能是有利的。此外，集成制造工艺完全避免了传统超材料中的界面效应。结果，建议的BSM吸收器在2 = 40 GHz频率范围内，TE = 0°极化时，在-9.5 dB以下时显示29.54 GHz的吸收带宽（> 88.7％吸收），而在TM = 50下，在-9.5 dB以下时显示35 GHz °极化。对微观和宏观吸收机理的分析表明，与介电损耗相比，磁损耗主要导致功率损耗。这突出表明，BSM吸收器是诸如通信设备和军事装备等进一步实际应用的合适候选者。

"点击查看英文标题和摘要"

Multi-scale integrated design and fabrication of ultrathin broadband microwave absorption utilizing carbon fiber/Prussian blue/Fe3O4-based lossy lattice metamaterial

Microwave absorption materials (MAMs) are specialist kinds of composites applied in stealth technology and electromagnetic interference (EMI). However, it is tough to satisfy the ultrathin and broadband requirements due to the imperfect impedance matching with external air and single absorbing fillers. Herein, a lower concentration of short carbon fiber (SCF)/Prussian blue (PB)/Fe₃O₄/epoxy resin (EP)-based butterfly-scale metamaterial (BSM) absorber with ultrathin and broadband was achieved via integrated design and fabrication. This revealed that the synergic effect between the SCF/PB/Fe₃O₄/EP MAMs with dielectric–magnetic behavior and physical resonance loss of the periodic unit for the BSM absorber is profitable for improving the electromagnetic absorption performance. Furthermore, the integrated fabrication process completely avoided the interface effect in traditional metamaterials. As a result, the proposed BSM absorber exhibited an absorption bandwidth of 29.54 GHz below −9.5 dB (>88.7% absorption) under TE = 0° polarization in the 2–40 GHz frequency range and 35 GHz below −9.5 dB under TM = 50° polarization. Analysis of the micro- and macro-absorption mechanism implied that the magnetic loss mainly resulted in power loss compared with dielectric loss. This highlights that the BSM absorber is an appropriate candidate for further practical applications, such as communication devices and military equipment.

更新日期：2021-05-05

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