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Volume 30 Issue 3
Mar.  2023
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文章导航 >  矿物冶金与材料学报（英文）  > 2023  >  30(3): 591-599
Guomin Li, Xiaojie Xue, Lutao Mao, Yake Wang, Lingxiao Li, Guizhen Wang, Kewei Zhang, Rong Zhang, Yuexiang Wang, and Liping Liang, Recycling and utilization of coal gasification residues for fabricating Fe/C composites as novel microwave absorbents, Int. J. Miner. Metall. Mater., 30(2023), No. 3, pp. 591-599. https://doi.org/10.1007/s12613-022-2534-0
Cite this article as:
Guomin Li, Xiaojie Xue, Lutao Mao, Yake Wang, Lingxiao Li, Guizhen Wang, Kewei Zhang, Rong Zhang, Yuexiang Wang, and Liping Liang, Recycling and utilization of coal gasification residues for fabricating Fe/C composites as novel microwave absorbents, Int. J. Miner. Metall. Mater., 30(2023), No. 3, pp. 591-599. https://doi.org/10.1007/s12613-022-2534-0
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研究论文

回收利用煤气化残渣制备新型微Fe/C复合微波吸收材料

  • 1)

    太原科技大学材料科学与工程学院，太原 030024，中国

  • 2)

    海南大学热带岛屿资源先进材料教育部重点实验室，海口 570228，中国

  • 3)

    中国科学院山西煤炭化学研究所煤转化国家重点实验室，太原 030001，中国

  • 4)

    中国-白俄罗斯电磁环境效应"一带一路"联合实验室，太原 030032，中国

  • 通讯作者:

    力国民    E-mail: ligm@tyust.edu.cn

    王桂振    E-mail: wangguizhen0@hotmail.com

文章亮点

  • (1) 研究了利用煤气化残渣制备Fe/CGR复合材料的实验过程及微观反应机理。
  • (2) 探究了磁性组分Fe的负载量对Fe/CGR复合材料的形貌和吸波性能的影响规律。
  • (3) 阐明了Fe/CGR复合材料对电磁波的吸收与损耗机理。
  • 在全球能源结构转型的背景下，煤气化技术展现出广阔应用前景，但其副产品煤气化残渣（CGR）仍未得到有效的回收利用。煤气化残渣含有丰富的碳成分，因此可以考虑作为碳基载体应用于微波吸收领域。在本研究中，通过浸渍Fe3+和还原反应制备了Fe/CGR复合微波吸收材料，并研究了磁性组分Fe的负载量对复合材料形貌和电磁性能的影响。此外，调整硝酸铁溶液的浓度，可以合理调控Fe/CGR复合材料的磁性成分负载量及其表面结构形貌。从扫描电镜照片可以看到Fe颗粒均匀地嵌入在CGR基体上，有效增加了复合材料的界面，进而增强了界面极化，进一步提高了复合材料的微波吸收性能。当Fe3+浓度为1.0 mol/L时，Fe/CGR复合材料表现出了优异的吸波性能，在涂覆厚度为2.5 mm时，最小反射损耗值可达−39.3 dB，当涂覆厚度为1.5 mm时对应的有效吸收带宽高达到4.1 GHz。本研究最终获得了兼具阻抗匹配和吸波性能的材料简易制备工艺与资源回收利用方法，所制备的Fe/CGR复合吸波材料不仅提升了CGR的回收率，而且也为微波吸收材料的合成开辟了一条新途径。
    • Research Article

    Recycling and utilization of coal gasification residues for fabricating Fe/C composites as novel microwave absorbents

    + Author Affiliations
      Abstract
    • Under the background of a transformation of the global energy structure, coal gasification technology has a wide application prospect, but its by-product, the coal gasification residue (CGR), is still not being efficiently utilized for recycling. The CGR contains abundant carbon components, which could be applied to the microwave absorption field as the carbon matrix. In this study, Fe/CGR composites are fabricated via a two-step method, including the impregnation of Fe3+ and the reduction process. The influence of the different loading capacities of the Fe component on the morphology and electromagnetic properties is studied. Moreover, the loading content of Fe and the surface morphology of the Fe/CGR can be reasonably controlled by adjusting the concentration of the ferric nitrate solution. Meanwhile, Fe particles are evenly inserted on the CGR framework, which expands the Fe/CGR interfaces to enhance interfacial polarization, thus further improving the microwave-absorbing (MA) properties of composites. Particularly, as the Fe3+ concentration is 1.0 mol/L, the Fe/CGR composite exhibits outstanding performance. The reflection loss reaches −39.3 dB at 2.5 mm, and the absorption bandwidth covers 4.1 GHz at 1.5 mm. In this study, facile processability, resource recycling, appropriately matched impedance, and excellent MA performance are achieved. Finally, the Fe/CGR composites not only enhance the recycling of the CGR but also pioneer a new path for the synthesis of excellent absorbents.
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