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<p>In this work, we have reported a strategy about improvement of magnetic properties of FeSi SMC via regulating resin content and particle size distribution. The results show that distribution of resin in powders system has an impact on agglomeration of particles, which is determined by resin content and particle size. A good agglomeration state can effectively improve filling performance of powders, thereby enhancing density of cores. Consequently, the SMC with appropriate resin content has good soft magnetic properties. Meanwhile, the SMCs with different particle size distribution exhibit varying frequency-dependent behaviors. Moreover, in order to overcome poor thermal stability and magnetic dilution of single organic coating, Ni-Zn ferrite insulation layer was coated on the surface of FeSi powders by in-situ growth method. The SMCs with the varying amounts of Ni-Zn ferrite (0.5, 1.0, 2.0 wt.%) were researched. Due to its continuous magnetic ferrite phase around particles, the SMC with 0.5 wt.% Ni-Zn ferrite has the best comprehensive magnetic properties, exhibiting a high <i>μ</i><sub><i>e</i></sub> of 92 and simultaneous a low <i>P</i><sub>cv</sub> of 125.6 mW/cm<sup>3</sup> (50 mT and 50&#xa0;kHz). And it showcases better soft magnetic properties than most of FeSi SMCs reported so far.</p>

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Optimizing Ni-Zn ferrite/resin insulation layer to improve the magnetic properties of FeSi soft magnetic composites

  • 期刊论文

  • 发表日期：

    2025年12月12日

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  • Hai Huang,
  • Lanzhou Guo,
  • Dongqing Zhou,
  • Xiaoqiang Xiong,
  • Chenglong Yuan,
  • Huayang Gong,
  • Muhammad Imran Arshad,
  • Alex V. Trukhanov,
  • Xiaodong Jing

摘要

In this work, we have reported a strategy about improvement of magnetic properties of FeSi SMC via regulating resin content and particle size distribution. The results show that distribution of resin in powders system has an impact on agglomeration of particles, which is determined by resin content and particle size. A good agglomeration state can effectively improve filling performance of powders, thereby enhancing density of cores. Consequently, the SMC with appropriate resin content has good soft magnetic properties. Meanwhile, the SMCs with different particle size distribution exhibit varying frequency-dependent behaviors. Moreover, in order to overcome poor thermal stability and magnetic dilution of single organic coating, Ni-Zn ferrite insulation layer was coated on the surface of FeSi powders by in-situ growth method. The SMCs with the varying amounts of Ni-Zn ferrite (0.5, 1.0, 2.0 wt.%) were researched. Due to its continuous magnetic ferrite phase around particles, the SMC with 0.5 wt.% Ni-Zn ferrite has the best comprehensive magnetic properties, exhibiting a high μe of 92 and simultaneous a low Pcv of 125.6 mW/cm3 (50 mT and 50 kHz). And it showcases better soft magnetic properties than most of FeSi SMCs reported so far.