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Study on the magnetic property of Fe–Si–B amorphous magnetic powder core coated with Al2O3/phosphoric acid–Al2O3 double layer

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Abstract

To study the magnetic loss of electronic devices in high-frequency applications, Fe–Si–B magnetic powder cores coated with Al2O3 or phosphoric acid–alumina composite coating were prepared. In this paper, the effects of nano-Al2O3 powders and phosphoric acid with different contents on magnetic properties such as magnetic loss and permeability of magnetic materials were investigated. In addition, three kinds of amorphous Fe–Si–B powders (D50 = 21.78 μm, 11.59 μm, 5.554 μm) were mixed to find the best particle size ratio. The results show that the coating of mixture of 0.8 wt% phosphoric acid and 0.2 wt% Al2O3 achieves excellent magnetic properties (μ′ = 22.34; Pcv = 205.4 mW/cm3 measured at 1000 kHz, 20 mT) with a particle size ratio of 2:6:2.

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Funding

This work was supported by the National Key R&D Program of China (Grant No. 2021YFB3502400), the National Natural Science Foundation of China (No. 51872004), the Key Research and Development Plan of Anhui Province (Nos. 201904a05020038, 202003a05020051).

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Authors and Affiliations

  1. Engineering Technology Research Center of Magnetic Materials, Anhui Province, School of Materials Science and Engineering, Anhui University, Hefei, 230601, People’s Republic of China

    Yong Zhu, Cong Zhang & Xucai Kan

  2. BGRIMM Technology Group Co. LTD, Bei**g, 100160, People’s Republic of China

    Wei Sun

Authors
  1. Yong Zhu
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  2. Cong Zhang
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  3. **ansong Liu
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  4. Xucai Kan
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  5. Shuangjiu Feng
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  6. Qingrong Lv
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  7. Wei Sun
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Contributions

YZ: Conceptualization, Formal analysis, Data curation, Writing—original draft, Visualization. CZ: Methodology, Validation. XL: Funding acquisition. XK: Resources, Writing—review and editing, Supervision. SF: Formal analysis, Investigation. QL: Project administration. WS: Funding acquisition.

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Correspondence to Xucai Kan.

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Zhu, Y., Zhang, C., Liu, X. et al. Study on the magnetic property of Fe–Si–B amorphous magnetic powder core coated with Al2O3/phosphoric acid–Al2O3 double layer. J Mater Sci: Mater Electron 34, 292 (2023). https://doi.org/10.1007/s10854-022-09755-9

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