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共混树脂包覆铁基磁粉芯的制备与性能

余红雅 李开沥 黎向东 刘仲武 郭宝春 李竞舟

余红雅, 李开沥, 黎向东, 等. 共混树脂包覆铁基磁粉芯的制备与性能[J]. 复合材料学报, 2024, 41(1): 315-322. doi: 10.13801/j.cnki.fhclxb.20230509.003
引用本文: 余红雅, 李开沥, 黎向东, 等. 共混树脂包覆铁基磁粉芯的制备与性能[J]. 复合材料学报, 2024, 41(1): 315-322. doi: 10.13801/j.cnki.fhclxb.20230509.003
YU Hongya, LI Kaili, LI Xiangdong, et al. Preparation and properties of iron based soft magnetic composites coated with mixed resin[J]. Acta Materiae Compositae Sinica, 2024, 41(1): 315-322. doi: 10.13801/j.cnki.fhclxb.20230509.003
Citation: YU Hongya, LI Kaili, LI Xiangdong, et al. Preparation and properties of iron based soft magnetic composites coated with mixed resin[J]. Acta Materiae Compositae Sinica, 2024, 41(1): 315-322. doi: 10.13801/j.cnki.fhclxb.20230509.003

共混树脂包覆铁基磁粉芯的制备与性能

doi: 10.13801/j.cnki.fhclxb.20230509.003
基金项目: 东莞市引进创新科研团队项目(2020607231010);广东省自然科学基金面上项目(2021A1515012464)
详细信息
    通讯作者:

    余红雅,博士,副教授,硕士生导师,研究方向为磁性功能材料、材料表面技术 E-mail: yuhongya@scut.edu.cn

  • 中图分类号: TB333

Preparation and properties of iron based soft magnetic composites coated with mixed resin

Funds: Dongguan Innovative Research Team Program (2020607231010); Guangdong Provincial Natural Science Fund of China (2021A1515012464)
  • 摘要: 随着移动通讯、智能制造、汽车电子与电子新能源等新兴领域的快速发展,对磁粉芯的损耗及其他方面的性能提出了更高的要求。将环氧树脂与有机硅树脂进行共混改性,并对磷化处理后的羰基铁粉进行有机绝缘包覆,再对包覆后的磁粉进行压制成型及固化处理制备成铁基磁粉芯(SMCs)。研究了不同成分共混树脂对铁基磁粉芯组织结构与电磁学性能的影响。结果表明,共混树脂通过形成有效的包覆层结构,减少粉末颗粒在压制过程所引入的应变,同时隔离颗粒间的接触以切断涡流,使所制备的磁粉芯密度达到6.82 g/cm3、电阻率高达1.1×106 Ω·cm,并提高了品质因数,降低了高频损耗。当共混树脂由33.3wt%环氧树脂与66.7wt%有机硅树脂组成时,铁基磁粉芯的综合性能最佳,在200 kHz下的功率损耗仅为1182.7 kW/m3。通过选用合适成分的共混树脂包覆剂,进一步优化铁基磁粉芯的磁性能,在中高频领域具有广阔的应用前景。

     

  • 图  1  不同成分配比树脂包覆后磁粉的SEM图像: (a) SMCs;(b) 16.7wt%EP/SMCs;(c) 33.3wt%EP/SMCs;(d) 50.0wt%EP/SMCs;(e) 83.3wt%EP/SMCs;(f) 100.0wt%EP/SMCs

    Figure  1.  SEM images of the magnetic powders coated with different mixed resins: (a) SMCs; (b) 16.7wt%EP/SMCs; (c) 33.3wt%EP/SMCs; (d) 50.0wt%EP/SMCs; (e) 83.3wt%EP/SMCs; (f) 100.0wt%EP/SMCs

    图  2  不同成分配比树脂包覆磁粉芯的断面SEM图像:(a) SMCs;(b) 16.7wt%EP/SMCs;(c) 33.3wt%EP/SMCs;(d) 50.0wt%EP/SMCs;(e) 83.3wt%EP/SMCs;(f) 100.0wt%EP/SMCs

    Figure  2.  Fracture SEM images of the SMCs based on the powders coated with different mixed resins: (a) SMCs; (b) 16.7wt%EP/SMCs; (c) 33.3wt%EP/SMCs; (d) 50.0wt%EP/SMCs; (e) 83.3wt%EP/SMCs; (f) 100.0wt%EP/SMCs

    图  3  不同成分配比树脂对磁粉芯密度的影响

    Figure  3.  Effects of the mixed resin composition on the SMCs density

    图  4  不同成分配比树脂对磁粉芯电阻率的影响

    Figure  4.  Effects of the mixed resin composition on the SMCs resistivity

    图  5  不同成分配比树脂包覆磁粉芯的复数磁导率µ:(a) 实部μ'-环氧树脂占比曲线图;(b) 虚部μ''-频率曲线图

    Figure  5.  Permeability µ of the cores coated with different mixed resins: (a) μ'-epoxy resin proportion curve; (b) μ''-frequency curves

    图  6  不同成分配比树脂包覆磁粉芯的损耗因子

    Figure  6.  Loss factor of the cores coated with different mixed resins

    图  7  不同成分配比树脂包覆磁粉芯的品质因数

    Figure  7.  Quality factor of the cores coated with different mixed resins

    图  8  不同成分配比树脂包覆磁粉芯的功率损耗随频率变化曲线(a)和随树脂成分变化曲线(b)

    Figure  8.  Core loss curves of the cores under different frequencies (a) and with different resin compositions (b)

    表  1  共混树脂成分配比

    Table  1.   Ingredients list of the mixed resin

    Samples number Epoxy resin∶Silicone
    resin (mass ratio)
    Epoxy percentage/
    wt%
    SMCs 0∶1 0.0
    16.7wt%EP/SMCs 1∶5 16.7
    33.3wt%EP/SMCs 1∶2 33.3
    50.0wt%EP/SMCs 1∶1 50.0
    66.7wt%EP/SMCs 2∶1 66.7
    83.3wt%EP/SMCs 5∶1 83.3
    100.0wt%EP/SMCs 1∶0 100.0
    Notes: SMCs—Soft magnetic composites; EP—Epoxy resin.
    下载: 导出CSV
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出版历程
  • 收稿日期:  2023-02-28
  • 修回日期:  2023-04-23
  • 录用日期:  2023-05-04
  • 网络出版日期:  2023-05-09
  • 刊出日期:  2024-01-01

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