FeSiCr-Based Soft Magnetic Composites with SiO<sub>2</sub> Insulation Coating Prepared Using the Elemental Silicon Powder Hydrolysis Method
In this work, FeSiCr powders were coated with a SiO<sub>2</sub> insulation layer for soft magnetic composites (SMCs) through elemental silicon powder hydrolysis, without using any expensive precursors. The effects of the reaction temperature and ammonia concentration on the structure and...
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MDPI AG
2023-08-01
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| Online Access: | https://www.mdpi.com/2075-4701/13/8/1444 |
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| author | Chunlong Li Hongya Yu Guangze Han Zhongwu Liu |
| author_facet | Chunlong Li Hongya Yu Guangze Han Zhongwu Liu |
| author_sort | Chunlong Li |
| collection | DOAJ |
| description | In this work, FeSiCr powders were coated with a SiO<sub>2</sub> insulation layer for soft magnetic composites (SMCs) through elemental silicon powder hydrolysis, without using any expensive precursors. The effects of the reaction temperature and ammonia concentration on the structure and performance of SMCs were investigated. Through the elemental silicon powder hydrolysis process, the formation of an FeSiCr–SiO<sub>2</sub> core-shell structure effectively reduced the core loss, increased resistivity, and improved the quality factor of SMCs. SMCs prepared with 0.10 mL/g ammonia concentration at 50 °C exhibited the best combination of properties, with saturation magnetization <i>M</i><sub>s</sub> = 169.40 emu/g, effective permeability <i>μ</i><sub>e</sub> = 40.46, resistivity <i>ρ</i> = 7.1 × 10<sup>6</sup> Ω·cm, quality factor <i>Q</i> = 57.07 at 1 MHz, and core loss <i>P</i><sub>s</sub> = 493.3 kW/m<sup>3</sup> at 50 mT/100 kHz. Compared to the uncoated sample, SMCs with a SiO<sub>2</sub> coating exhibit 23% reduction in <i>P</i><sub>s</sub>, with only 6.6% reduction in <i>μ</i><sub>e</sub>. Compared to SMCs fabricated using the traditional sol-gel method, the sample prepared through hydrolysis of elemental silicon powder has higher permeability and lower core loss. In particular, this new approach gives an effective coat solution for the mass production of high-temperature-resistant SMCs. |
| first_indexed | 2024-03-10T23:44:46Z |
| format | Article |
| id | doaj.art-9189ad088d17462da7671b2e05496828 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T23:44:46Z |
| publishDate | 2023-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-9189ad088d17462da7671b2e054968282023-11-19T02:11:17ZengMDPI AGMetals2075-47012023-08-01138144410.3390/met13081444FeSiCr-Based Soft Magnetic Composites with SiO<sub>2</sub> Insulation Coating Prepared Using the Elemental Silicon Powder Hydrolysis MethodChunlong Li0Hongya Yu1Guangze Han2Zhongwu Liu3School of Physics and Optoelectronics, South China University of Technology, Guangzhou 510640, ChinaSchool of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, ChinaSchool of Physics and Optoelectronics, South China University of Technology, Guangzhou 510640, ChinaSchool of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, ChinaIn this work, FeSiCr powders were coated with a SiO<sub>2</sub> insulation layer for soft magnetic composites (SMCs) through elemental silicon powder hydrolysis, without using any expensive precursors. The effects of the reaction temperature and ammonia concentration on the structure and performance of SMCs were investigated. Through the elemental silicon powder hydrolysis process, the formation of an FeSiCr–SiO<sub>2</sub> core-shell structure effectively reduced the core loss, increased resistivity, and improved the quality factor of SMCs. SMCs prepared with 0.10 mL/g ammonia concentration at 50 °C exhibited the best combination of properties, with saturation magnetization <i>M</i><sub>s</sub> = 169.40 emu/g, effective permeability <i>μ</i><sub>e</sub> = 40.46, resistivity <i>ρ</i> = 7.1 × 10<sup>6</sup> Ω·cm, quality factor <i>Q</i> = 57.07 at 1 MHz, and core loss <i>P</i><sub>s</sub> = 493.3 kW/m<sup>3</sup> at 50 mT/100 kHz. Compared to the uncoated sample, SMCs with a SiO<sub>2</sub> coating exhibit 23% reduction in <i>P</i><sub>s</sub>, with only 6.6% reduction in <i>μ</i><sub>e</sub>. Compared to SMCs fabricated using the traditional sol-gel method, the sample prepared through hydrolysis of elemental silicon powder has higher permeability and lower core loss. In particular, this new approach gives an effective coat solution for the mass production of high-temperature-resistant SMCs.https://www.mdpi.com/2075-4701/13/8/1444soft magnetic compositessilica insulation coatinghydrolysis methodmagnetic propertiescore loss |
| spellingShingle | Chunlong Li Hongya Yu Guangze Han Zhongwu Liu FeSiCr-Based Soft Magnetic Composites with SiO<sub>2</sub> Insulation Coating Prepared Using the Elemental Silicon Powder Hydrolysis Method Metals soft magnetic composites silica insulation coating hydrolysis method magnetic properties core loss |
| title | FeSiCr-Based Soft Magnetic Composites with SiO<sub>2</sub> Insulation Coating Prepared Using the Elemental Silicon Powder Hydrolysis Method |
| title_full | FeSiCr-Based Soft Magnetic Composites with SiO<sub>2</sub> Insulation Coating Prepared Using the Elemental Silicon Powder Hydrolysis Method |
| title_fullStr | FeSiCr-Based Soft Magnetic Composites with SiO<sub>2</sub> Insulation Coating Prepared Using the Elemental Silicon Powder Hydrolysis Method |
| title_full_unstemmed | FeSiCr-Based Soft Magnetic Composites with SiO<sub>2</sub> Insulation Coating Prepared Using the Elemental Silicon Powder Hydrolysis Method |
| title_short | FeSiCr-Based Soft Magnetic Composites with SiO<sub>2</sub> Insulation Coating Prepared Using the Elemental Silicon Powder Hydrolysis Method |
| title_sort | fesicr based soft magnetic composites with sio sub 2 sub insulation coating prepared using the elemental silicon powder hydrolysis method |
| topic | soft magnetic composites silica insulation coating hydrolysis method magnetic properties core loss |
| url | https://www.mdpi.com/2075-4701/13/8/1444 |
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