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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, 2023, 41(0): 1-9
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, 2023, 41(0): 1-9
Hongya YU, Kaili LI, Xiangdong LI, Zhongwu LIU, Baochun GUO, Jingzhou LI. Preparation and properties of iron based soft magnetic composites coated with mixed resin[J]. Acta Materiae Compositae Sinica.
Citation: Hongya YU, Kaili LI, Xiangdong LI, Zhongwu LIU, Baochun GUO, Jingzhou LI. Preparation and properties of iron based soft magnetic composites coated with mixed resin[J]. Acta Materiae Compositae Sinica.

共混树脂包覆铁基磁粉芯的制备与性能

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,女,博士,副教授;研究方向:磁性功能材料、材料表面技术; E-mail:yuhongya@scut.edu.cn

  • 中图分类号: TB331

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: 仅采用单一成分的树脂进行有机绝缘包覆,只能在高温稳定性与粘结性能间进行选择,往往会出现“短板”。而尝试多组分共混树脂进行包覆可以得到较优的综合性能,从而拓宽铁基磁粉芯高温适用性。本文通过环氧树脂对有机硅树脂进行共混改性,采用共混改性的树脂对磷化处理后的羰基铁粉进行有机绝缘包覆,并通过对磁粉进行压制成型及固化处理制备成铁基磁粉芯。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。不同成分配比树脂包覆磁粉芯的功率损耗:(a) 随频率变化;(b) 随树脂成分变化

     

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

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

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

    Figure  2.  Fracture surface morphology of the SMCs based on the powders coated with different mixed resins: (a) SMCs;(b) 16.7 wt.%EP/SMCs;(c) 33.3 wt.%EP/SMCs;(d) 50.0 wt.%EP/SMCs;(e) 83.3 wt.%EP/SMCs;(f) 100.0 wt.%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:(a) 实部-环氧树脂占比曲线图;(b) 虚部-频率曲线图

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

    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曲线:(a) 随频率变化;(b) 随树脂成分变化

    Figure  8.  Ps 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 numberSMCs16.7wt.%EP/SMCs33.3wt.%EP/SMCs50.0wt.%EP/SMCs66.7wt.%EP/SMCs83.3wt.%EP/SMCs100.0wt.%EP/SMCs
    Epoxy resin:Silicone resin (mass ratio)0∶11∶51∶21∶12∶15∶11∶0
    Epoxy percent/wt.%0.016.733.350.066.783.3100.0
    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:  2023-05-13

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