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回收利用煤矸石低成本制备Ni/C/CG复合型吸波材料

梁丽萍 高飞 王亚珂 朱保顺 力国民

梁丽萍, 高飞, 王亚珂, 朱保顺, 力国民. 回收利用煤矸石低成本制备Ni/C/CG复合型吸波材料[J]. 燃料化学学报. doi: 10.19906/j.cnki.JFCT.2021066
引用本文: 梁丽萍, 高飞, 王亚珂, 朱保顺, 力国民. 回收利用煤矸石低成本制备Ni/C/CG复合型吸波材料[J]. 燃料化学学报. doi: 10.19906/j.cnki.JFCT.2021066
LIANG Li-ping, GAO Fei, WANG Ya-ke, ZHU Bao-shun, LI Guo-min. Low-cost preparation of Ni/C/CG composites for microwave absorption by recycling coal gangue[J]. Journal of Fuel Chemistry and Technology. doi: 10.19906/j.cnki.JFCT.2021066
Citation: LIANG Li-ping, GAO Fei, WANG Ya-ke, ZHU Bao-shun, LI Guo-min. Low-cost preparation of Ni/C/CG composites for microwave absorption by recycling coal gangue[J]. Journal of Fuel Chemistry and Technology. doi: 10.19906/j.cnki.JFCT.2021066

回收利用煤矸石低成本制备Ni/C/CG复合型吸波材料

doi: 10.19906/j.cnki.JFCT.2021066
基金项目: 国家自然科学基金项目(51802212);山西省自然科学基金项目(201801D221119);山西省高等学校科技创新项目(2019L0617);山西省研究生优秀创新项目(2020SY415)
详细信息
    作者简介:

    梁丽萍(1970-),女,博士,教授。邮箱:liangliping@tyust.edu.cn

    通讯作者:

    梁丽萍(1970-),女,博士,教授。邮箱:liangliping@tyust.edu.cn

    力国民(1984-),男,博士,副教授。邮箱:ligm@tyust.edu.cn

  • 中图分类号: TB34

Low-cost preparation of Ni/C/CG composites for microwave absorption by recycling coal gangue

Funds: The National Natural Science Foundation of China (51802212), The Natural Science Foundation of Shanxi Province (201801D221119), The Scientific and Technological Innovation Programs of High Education Institutions in Shanxi (2019L0617), Shanxi Postgraduate Innovation Project (2020SY415)
More Information
  • 摘要: 采用煤矸石(CG)作含碳载体、淀粉作补充C源、硝酸镍作Ni源,借助液相浸渍结合碳热还原工艺制备Ni/C/CG复合型微波吸收材料;研究碳热还原温度对材料组成、微观结构与性能的影响。结果表明,碳热还原温度会影响碳与Ni的结晶状态及Ni微粒大小,进而对材料的电磁性能特别是介电性能产生显著影响。得益于良好的阻抗匹配特性与强的微波衰减能力,在600−800 ℃较宽的温度范围内制备得到的Ni/C/CG复合材料可以均显示出优良的微波吸收性能。其中,800 ℃热处理样品的最低反射损耗可达−20.9 dB,相应的有效带宽为3.8 GHz(测试涂层厚度为2 mm)。介电损耗是主要的微波吸收机制,主要源于材料中石墨化的碳与Ni微粒所引起的漏导损耗及各组元间界面带来的界面极化损耗。
  • 图  1  样品的XRD图谱

    Figure  1  XRD patterns of the samples

    图  2  样品的拉曼散射光谱图

    Figure  2  Raman spectra of the samples

    图  3  典型样品的SEM图片

    Figure  3  SEM images of the typical samples

    (a) CG, (b) NiCG-400, (c) NiCG-600, (d) NiCG-700, (e) NiCG-800

    图  4  典型样品NiCG-600的元素分布图

    Figure  4  Elemental mappings of the typical sample NiCG-600

    Al (a), Si (b), O (c), Ni (d) and C (e)

    图  5  典型样品的反射损耗曲线

    Figure  5  Reflection loss curves of the typical samples

    (a) NiCG-400, (b) NiCG-600, (c) NiCG-700, (d) NiCG-800

    图  6  典型样品的阻抗匹配特性(Z = |Zin/Z0|)曲线

    Figure  6  Impedance-matching characteristic (Z = |Zin/Z0|) curves of the typical samples

    (a) NiCG-400, (b) NiCG-600, (c) NiCG-700, (d) NiCG-800

    图  7  样品的衰减常数(a)与损耗因子(b)随频率的变化曲线

    Figure  7  Frequency dependency curves of the attenuation constant α (a) and loss tangent (b) of the samples

    图  8  样品的复介电常数随频率变化曲线与Cole-Cole半圆

    Figure  8  Frequency dependence of permittivity (a) and (b) and Cole-Cole semicircles of samples (c)

    图  9  样品的复磁导率随频率的变化曲线(a)和(b)与μ″(μ′)−2f −1值随频率的变化曲线(c)

    Figure  9  Frequency dependence of permeability (a) and (b), and μ″(μ′)−2f−1 versus frequency (c) of samples

    表  1  酸洗前后煤矸石XRFS分析结果

    Table  1  XRFS analysis results of coal gangue samples before and after pickling

    ElementsSiAlSKCaFeTi
    Before pickling41.83727.7953.2892.1814.03317.5991.235
    After pickling56.52429.2114.5773.2440.3432.8341.963
    下载: 导出CSV
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  • 收稿日期:  2021-05-27
  • 修回日期:  2021-06-28
  • 网络出版日期:  2021-07-19

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