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Enhanced soft magnetic properties of SiO2-coated FeSiCr magnetic powder cores by particle size effect |
| Mingyue Ge(葛铭悦)1, Likang Xiao(肖礼康)2, Xiaoru Liu(刘潇如)1, Lin Pan(潘嶙)3, Zhangyang Zhou(周章洋)3, Jianghe La(蓝江河)2, Zhengwei Xiong(熊政伟)1,4,†, Jichuan Wu(吴冀川)3,‡, and Zhipeng Gao(高志鹏)1,3,§ |
1 Joint Laboratory for Extreme Conditions Matter Properties, School of Mathematics and Physics, Southwest University of Science and Technology, Mianyang 621010, China;
2 Southwest Institute of Applied Magnetism, Mianyang 621010, China;
3 Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, China;
4 Sichuan Civil-military Integration Institute, Mianyang 621010, China |
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Abstract It has been known that metal FeSiCr powders with large average particle sizes have been typically employed to prepare magnetic powder cores (SMCs), with few studies reported on the influence of magnetic properties for original powders with various average particle sizes less than 10 μm. In this work, SiO$_{2}$-coated FeSiCr SMCs with different small particle sizes were synthesized using the sol-gel process. The contribution of SiO$_{2}$ coating amount and voids to the soft magnetic properties was elaborated. The mechanism was revealed such that smaller particle sizes with less voids could be beneficial for reducing core loss in the SMCs. By optimizing the core structure, permeability and magnetic loss of 26 and 262 kW/cm$^{3}$ at 100 kHz and 50 mT were achieved at a particle size of 4.8 μm and ethyl orthosilicate addition of 0.1 mL/g. The best DC stacking performance, reaching 87%, was observed at an ethyl orthosilicate addition rate of 0.25 mL/g under 100 Oe. Compared to other soft magnetic composites (SMCs), the FeSiCr/SiO$_{2}$ SMCs exhibit significantly reduced magnetic loss. It further reduces the magnetic loss of the powder core, providing a new strategy for applications of SMCs at high frequencies.
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Received: 09 May 2024
Revised: 02 July 2024
Accepted manuscript online: 19 July 2024
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PACS:
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75.47.Np
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(Metals and alloys)
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| Fund: This work was supported by the National Natural Science Foundation of China (Grant Nos. U2230119 and U23A20567), 2022 Central Guidance on Local Science and Technology Development Projects (Grant No. 2022ZYDF073), and Outstanding Youth Fund of Sichuan Province (Grant No. 22JCQN0005). |
Corresponding Authors:
Zhengwei Xiong, Jichuan Wu, Zhipeng Gao
E-mail: zw-xiong@swust.edu.cn;junhuawu123@sina.cn;z.p.gao@foxmail.com
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Cite this article:
Mingyue Ge(葛铭悦), Likang Xiao(肖礼康), Xiaoru Liu(刘潇如), Lin Pan(潘嶙), Zhangyang Zhou(周章洋), Jianghe La(蓝江河), Zhengwei Xiong(熊政伟), Jichuan Wu(吴冀川), and Zhipeng Gao(高志鹏) Enhanced soft magnetic properties of SiO2-coated FeSiCr magnetic powder cores by particle size effect 2024 Chin. Phys. B 33 107503
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