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铁氧体/芦苇秆炭复合吸波材料的制备与性能

简煜 范勋娥 邱柏杨 田迅东 杨喜

简煜, 范勋娥, 邱柏杨, 等. 铁氧体/芦苇秆炭复合吸波材料的制备与性能[J]. 复合材料学报, 2024, 42(0): 1-10.
引用本文: 简煜, 范勋娥, 邱柏杨, 等. 铁氧体/芦苇秆炭复合吸波材料的制备与性能[J]. 复合材料学报, 2024, 42(0): 1-10.
JIAN Yu, FAN Xune, QIU Baiyang, et al. Preparation and microwave absorption properties of ferrite/ reed charcoal composites[J]. Acta Materiae Compositae Sinica.
Citation: JIAN Yu, FAN Xune, QIU Baiyang, et al. Preparation and microwave absorption properties of ferrite/ reed charcoal composites[J]. Acta Materiae Compositae Sinica.

铁氧体/芦苇秆炭复合吸波材料的制备与性能

基金项目: 国家自然科学基金 (31901375);湖南省自然科学基金 (S2022JJQNJJ0900);中南林科大人才启动基金(2018YJ033)
详细信息
    通讯作者:

    杨喜,博士,副教授,硕士生导师,研究方向为竹木材材性及改良、生物质炭材料 E-mail: yangxijy@126.com

  • 中图分类号: TB332

Preparation and microwave absorption properties of ferrite/ reed charcoal composites

Funds: National Natural Science Foundation of China (No. 31901375); The Natural Science Foundation of Hunan Province (No.S2022JJQNJJ0900); The Talent Initiation Fund of Central South University of Forestry and Technology
  • 摘要: 为了解决铁氧体吸波材料密度大、吸收带宽窄等问题,以芦苇茎秆为原料,采用常温浸渍及高温原位生长法制备了铁氧体/芦苇秆炭(Ferrite/RC)复合材料,通过调节碳化温度调控复合材料的电磁特性和电磁波吸收性能。SEM、TEM、XRD及VNA等结果表明:Ferrite/RC复合材料保留了芦苇杆天然的三维蜂窝状网络结构,Fe3O4及铁纳米颗粒均匀分布在芦苇秆炭壁与孔道中;提升碳化温度(650~690℃)可增大复合材料的电导率与介电损耗能力,但温度过高会导致材料阻抗失配从而降低电磁衰减能力。碳化温度为670℃时制备的复合材料(FRC-670)吸波性能最佳,它在匹配厚度仅为1.7 mm时反射损耗达到−45.7 dB,对应有效吸收带宽为3.4 GHz;在厚度为2 mm时有效吸收带宽为5.7 GHz (12.1-17.8 GHz)。其主要的电磁波衰减机制源于复合材料良好的电导损耗、极化弛豫损耗以及电损耗与磁损耗的协同作用。铁氧体/芦苇秆炭复合材料优异的吸波性能在电磁波吸收领域具有良好前景,可促进芦苇资源的高值化与功能化应用。

     

  • 图  1  Ferrite/RC(FRC)复合材料的XRD图谱(a)和FRC-670的热重分析图(b)

    Figure  1.  XRD pattern(a) of Ferrite/RC (FRC) composites and thermogravimetric analysis diagram(b) of FRC-670

    图  2  FRC-670的SEM图像((a)~(d))和TEM图像((e)~(g))

    Figure  2.  SEM ((a)~(d)) and TEM ((e)~(g)) image of FRC-670

    图  3  Ferrite/RC复合材料的磁滞回线

    Figure  3.  Magnetic hysteresis loops of Ferrite/RC composites

    图  4  Ferrite/RC复合材料的电磁参数:复介电常数实部 (a)、虚部 (b) 和介电损耗正切值 (e);复磁导率实部 (c)、虚部 (d) 和磁损耗正切值 (f)

    Figure  4.  Electromagnetic parameters of Ferrite/RC composites: Real part (a), imaginary part (b) and tangent (e) of complex permittivity; Real part (c),imaginary part (d) and tangent (f) of permeability

    图  5  Ferrite/RC复合材料的ε'-ε''曲线图((a)-(c)), C0 (d), α (e), and |Z| (f)

    Figure  5.  ε'-ε'' curve ((a)-(c)), C0 (d), α (e) of Ferrite/RC composites and |Z| (f) of FRC-670

    图  6  FRC-650、FRC-670、RC690和RC-670的反射损耗值((a)~(d))

    Figure  6.  Reflection loss value ((a)~(d)) of FRC-650, FRC-670, FRC-690 and RC-670

    表  1  碳基吸波材料的性能对比

    Table  1.   Comparison of microwave absorption properties of carbon-based materials

    Absorber RLmin/dB EAB/GHz Thickness/mm Filler loading/wt% Ref.
    FRC-670 −45.7 3.4 1.7 35 This work
    FRC-670 −32.1 5.7 2.0 35 This work
    Walnut shell-based porous carbon −42.4 1.8 2.0 70 [35]
    Functionalized loofah sponge −43.8 5.3 3.0 50 [36]
    Rice husk-based porous C/Co −21.8 5.6 1.4 25 [37]
    Fe3O4@lignin −29.5 2.0 4.0 20 [38]
    NiO/porous carbon −33.8 6.7 8.0 30 [39]
    Wheat straw-derived carbon foam −37.0 8.8 2.5 10 [40]
    Shaddock peel-based CA −29.5 5.8 1.7 20 [31]
    BHPC −47.46 3.40 2.8 10 [41]
    Fe3C/biochar −45.6 5.5 4.24 30 [30]
    Cotton-derived porous Fe3O4/C composite −22.1 4.4 2.0 50 [42]
    NC@Fe3O4 −40.3 4.0 2.0 70 [43]
    Notes: RLmin is the minimum reflection loss value; EAB is the effective absorption bandwidth; CA―Carbon aerogel; BHPC―Biomass hierarchical porous carbon; NC―Nanoporous carbon.
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  • 收稿日期:  2023-11-16
  • 修回日期:  2023-12-19
  • 录用日期:  2024-01-08
  • 网络出版日期:  2024-02-01

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