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微波原位还原制备Fe/Fe2SiO4基金属陶瓷的研究

高陈波 徐鹏飞 阮飞 李红霞

高陈波, 徐鹏飞, 阮飞, 李红霞. 微波原位还原制备Fe/Fe2SiO4基金属陶瓷的研究[J]. 钢铁钒钛, 2021, 42(3): 135-142. doi: 10.7513/j.issn.1004-7638.2021.03.021
引用本文: 高陈波, 徐鹏飞, 阮飞, 李红霞. 微波原位还原制备Fe/Fe2SiO4基金属陶瓷的研究[J]. 钢铁钒钛, 2021, 42(3): 135-142. doi: 10.7513/j.issn.1004-7638.2021.03.021
Gao Chenbo, Xu Pengfei, Ruan Fei, Li Hongxia. Study on preparation of Fe/Fe2SiO4-based cermets by microwave in-situ reduction[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(3): 135-142. doi: 10.7513/j.issn.1004-7638.2021.03.021
Citation: Gao Chenbo, Xu Pengfei, Ruan Fei, Li Hongxia. Study on preparation of Fe/Fe2SiO4-based cermets by microwave in-situ reduction[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(3): 135-142. doi: 10.7513/j.issn.1004-7638.2021.03.021

微波原位还原制备Fe/Fe2SiO4基金属陶瓷的研究

doi: 10.7513/j.issn.1004-7638.2021.03.021
基金项目: 国家自然科学基金(51704172);内蒙古科技大学创新基金(2016QDL-B27)
详细信息
    作者简介:

    高陈波(1996—),男,江苏南通人,硕士研究生,主要从事无机非金属材料方面的研究工作,E-mail:18168079445@163.com

    通讯作者:

    徐鹏飞(1987—),男,河南南阳人,博士,硕士生导师,E-mail:24681012.qq.com@163.com

  • 中图分类号: TF12,TG148

Study on preparation of Fe/Fe2SiO4-based cermets by microwave in-situ reduction

  • 摘要: 以磁选铁精矿为主要原料,高岭土作为添加剂采用微波原位还原制备Fe/Fe2SiO4基金属陶瓷。概括介绍了利用微波加热原位还原磁选铁精矿研制铁基金属陶瓷的理论基础、主要技术路线和反应机理,结合XRD、SEM等分析测试方式,探究了高岭土添加含量对铁基金属陶瓷复合材料的物相、物理性能及微观组织的影响,为微波加热还原磁选铁精矿制备铁基多功能陶瓷材料的相关研究领域提供参考,对于促进矿产资源的高效综合利用具有重要的意义。结果表明:当烧结温度为835 ℃,保温时间为1 h,高岭土含量为15%时,制备的铁基金属陶瓷的综合性能最优,其主晶相为α-Fe,密度为5.56 g/cm3,维氏硬度值为7.35 GPa。
  • 图  1  试验流程

    Figure  1.  Experimental flowchart

    图  2  微波烧结示意

    Figure  2.  Schematic diagram of microwave sintering

    图  3  样品C1保温30 min物相分析

    Figure  3.  Phase analysis result of sample C1 incubated for 30 minutes

    图  4  反应吉布斯自由能与温度关系

    Figure  4.  Relationship between reaction temperature and Gibbs free energy

    图  5  产物示意

    Figure  5.  Schematic diagram of the product

    图  6  不同高岭土添加量XRD物相图

    Figure  6.  XRD phase diagram of resulted cement with different kaolin additions

    图  7  样品C1-C4断面微观结构

    Figure  7.  Microstructure of sample C1-C4 section

    图  8  样品C3断面EDS图

    Figure  8.  EDS images of sample C3 section

    图  9  不同高岭土添加量与密度关系

    Figure  9.  Relationship between cement density and Kaolin addition

    图  10  不同高岭土添加量与维氏硬度关系

    Figure  10.  Relationship between Vickers hardness of resulted cement and Kaolin addition

    表  1  磁选铁精矿的化学成分

    Table  1.   The chemical compositions of iron concentrate by magnetic separation %

    TFeFeOSiO2Al2O3CaOMgOMnO2TiO2
    65.5027.902.470.0470.760.881.010.029
    Na2OSNb2O5K2OBaOPF
    0.251.080.0730.10.0360.0690.28
    下载: 导出CSV

    表  2  试样配比

    Table  2.   Sample ratio

    编号原料/g高岭土/%
    C1505
    C25010
    C35015
    C45020
    注:原料配比为矿粉∶活性炭=17∶3。
    下载: 导出CSV
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  • 收稿日期:  2021-02-27
  • 刊出日期:  2021-06-10

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