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Volume 32 Issue 1
Jan.  2025
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文章导航 >  矿物冶金与材料学报（英文）  > 2025  >  32(1): 221-232
Yuanchun Zhang, Shengtao Gao, Xingzhao Zhang, Dacheng Ma, Chuanlei Zhu, and Jun He, Structural and microwave absorption properties of CoFe2O4/residual carbon composites, Int. J. Miner. Metall. Mater., 32(2025), No. 1, pp. 221-232. https://doi.org/10.1007/s12613-024-2849-0
Cite this article as:
Yuanchun Zhang, Shengtao Gao, Xingzhao Zhang, Dacheng Ma, Chuanlei Zhu, and Jun He, Structural and microwave absorption properties of CoFe2O4/residual carbon composites, Int. J. Miner. Metall. Mater., 32(2025), No. 1, pp. 221-232. https://doi.org/10.1007/s12613-024-2849-0
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研究论文

CoFe2O4/残碳复合材料的结构和微波吸收性能

  • 1)

    安徽理工大学煤炭安全精准开采国家地方联合工程研究中心, 淮南 232001, 中国

  • 2)

    安徽理工大学化工与爆破学院, 淮南 232001, 中国


  • 通讯作者:

    高圣涛    E-mail: shtgao@aust.edu.cn

文章亮点

  • (1) 通过水热法合成了CoFe2O4/煤气化细渣残碳复合材料
  • (2) CoFe2O4/煤气化细渣残碳复合材料表现出优异的雷达隐身性能
  • (3) 该复合材料优异的电磁波吸收性能源于其磁损耗和介电损耗的协同效应
  • 电磁干扰是当今社会迫切需要解决的问题，这就需要迅速发展具有优异电磁波吸收能力的吸波剂。本文以酸洗后的煤气化细渣为碳源，采用直接水热法制备了CoFe2O4/煤气化细渣残碳复合材料。研究了该复合材料的微观结构和电磁波吸收性能。通过CoFe2O4粒子改性煤气化细渣残碳，一方面可以利用CoFe2O4的磁性能提高煤气化细渣残碳基磁性吸波材料的磁性能，另一方面CoFe2O4与煤气化细渣残碳复合能够增加复合材料中的异质界面结构，进而提高煤气化细渣残碳基磁性吸波材料的介电性能；此外，通过调整CoFe2O4的添加量，能够有效调节CoFe2O4/煤气化细渣残碳吸波材料的介电性能和磁性能，实现材料的电-磁协同效应。由于CoFe2O4/煤气化细渣残碳复合材料的异质多界面结构设计和适当的阻抗匹配以及介电损耗和磁损耗之间的协同作用，CoFe2O4/煤气化细渣残碳/石蜡吸波剂表现出优异的且可调控的电磁波吸收性能。当吸波剂厚度为2.44 mm时，反射损耗最强，为−43.99 dB；当吸波剂厚度为1.18 mm时，有效吸收带宽达4.16 GHz。该吸波涂层能够有效地降低完美导体基板的电磁波散射。该研究为合成高效的煤气化细渣残碳基吸波材料提供了一种新的创制方法。
    • Research Article

    Structural and microwave absorption properties of CoFe2O4/residual carbon composites

    + Author Affiliations
      Abstract
    • Electromagnetic interference, which necessitates the rapid advancement of substances with exceptional capabilities for absorbing electromagnetic waves, is of urgent concern in contemporary society. In this work, CoFe2O4/residual carbon from coal gasification fine slag (CFO/RC) composites were created using a novel hydrothermal method. Various mechanisms for microwave absorption, including conductive loss, natural resonance, interfacial dipole polarization, and magnetic flux loss, are involved in these composites. Consequently, compared with pure residual carbon materials, this composite offers superior capabilities in microwave absorption. At 7.76 GHz, the CFO/RC-2 composite achieves an impressive minimum reflection loss (RLmin) of −43.99 dB with a thickness of 2.44 mm. Moreover, CFO/RC-3 demonstrates an effective absorption bandwidth (EAB) of up to 4.16 GHz, accompanied by a thickness of 1.18 mm. This study revealed the remarkable capability of the composite to diminish electromagnetic waves, providing a new generation method for microwave absorbing materials of superior quality.
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