Excellent Microwave Absorption Properties in the C Band for the Nitrided Y<sub>2</sub>Fe<sub>12</sub>Co<sub>4</sub>Si/Paraffin Composites
The nitriding process was employed to optimize the low-frequency microwave absorption properties of Y<sub>2</sub>Fe<sub>12</sub>Co<sub>4</sub>Si/paraffin composites. The effects of nitriding temperature on the phase composition, static magnetic properties, electro...
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MDPI AG
2025-06-01
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| Series: | Magnetochemistry |
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| author | Wenjian Tang Hanxing Xu Xichun Zhong Na He Zhongwu Liu Raju V. Ramanujan |
| author_facet | Wenjian Tang Hanxing Xu Xichun Zhong Na He Zhongwu Liu Raju V. Ramanujan |
| author_sort | Wenjian Tang |
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| description | The nitriding process was employed to optimize the low-frequency microwave absorption properties of Y<sub>2</sub>Fe<sub>12</sub>Co<sub>4</sub>Si/paraffin composites. The effects of nitriding temperature on the phase composition, static magnetic properties, electromagnetic parameters, and microwave absorption performance were systematically investigated. As the nitriding temperature increases, lattice expansion results in a significant increase in saturation magnetization and a higher ratio of in-plane to out-of-plane anisotropy fields. This, in turn, boosts the electromagnetic parameters of the composite material. With a further rise in temperature, an increased content of α-Fe is produced and the ratio of the in-plane to out-of-plane anisotropy field diminishes, leading to a decline in electromagnetic parameters. At 500 °C, these factors reach an optimum level, maximizing the composite’s electromagnetic parameters. The composite exhibited a minimum reflection loss (RL<sub>min</sub>) of −55.9 dB at 5.58 GHz with a thickness of 2.46 mm. Moreover, at a thickness of 2.21 mm, the composite achieved a maximum effective absorption bandwidth (EAB<sub>max</sub>) of 2.95 GHz (5.05–8 GHz). Compared with other low-frequency-absorbing materials, the composite exhibited stronger absorption and a wider absorption bandwidth at a lower thickness in the C band. |
| format | Article |
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| institution | Kabale University |
| issn | 2312-7481 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | MDPI AG |
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| series | Magnetochemistry |
| spelling | doaj-art-ac68897a392a4e90a0b05020bb53ad0d2025-08-20T03:32:32ZengMDPI AGMagnetochemistry2312-74812025-06-011175410.3390/magnetochemistry11070054Excellent Microwave Absorption Properties in the C Band for the Nitrided Y<sub>2</sub>Fe<sub>12</sub>Co<sub>4</sub>Si/Paraffin CompositesWenjian Tang0Hanxing Xu1Xichun Zhong2Na He3Zhongwu Liu4Raju V. Ramanujan5School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, ChinaSchool of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, ChinaSchool of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, SingaporeSchool of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, ChinaSchool of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, ChinaSchool of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, SingaporeThe nitriding process was employed to optimize the low-frequency microwave absorption properties of Y<sub>2</sub>Fe<sub>12</sub>Co<sub>4</sub>Si/paraffin composites. The effects of nitriding temperature on the phase composition, static magnetic properties, electromagnetic parameters, and microwave absorption performance were systematically investigated. As the nitriding temperature increases, lattice expansion results in a significant increase in saturation magnetization and a higher ratio of in-plane to out-of-plane anisotropy fields. This, in turn, boosts the electromagnetic parameters of the composite material. With a further rise in temperature, an increased content of α-Fe is produced and the ratio of the in-plane to out-of-plane anisotropy field diminishes, leading to a decline in electromagnetic parameters. At 500 °C, these factors reach an optimum level, maximizing the composite’s electromagnetic parameters. The composite exhibited a minimum reflection loss (RL<sub>min</sub>) of −55.9 dB at 5.58 GHz with a thickness of 2.46 mm. Moreover, at a thickness of 2.21 mm, the composite achieved a maximum effective absorption bandwidth (EAB<sub>max</sub>) of 2.95 GHz (5.05–8 GHz). Compared with other low-frequency-absorbing materials, the composite exhibited stronger absorption and a wider absorption bandwidth at a lower thickness in the C band.https://www.mdpi.com/2312-7481/11/7/54nitridingmicrowave absorptionrare earth soft magnetism |
| spellingShingle | Wenjian Tang Hanxing Xu Xichun Zhong Na He Zhongwu Liu Raju V. Ramanujan Excellent Microwave Absorption Properties in the C Band for the Nitrided Y<sub>2</sub>Fe<sub>12</sub>Co<sub>4</sub>Si/Paraffin Composites Magnetochemistry nitriding microwave absorption rare earth soft magnetism |
| title | Excellent Microwave Absorption Properties in the C Band for the Nitrided Y<sub>2</sub>Fe<sub>12</sub>Co<sub>4</sub>Si/Paraffin Composites |
| title_full | Excellent Microwave Absorption Properties in the C Band for the Nitrided Y<sub>2</sub>Fe<sub>12</sub>Co<sub>4</sub>Si/Paraffin Composites |
| title_fullStr | Excellent Microwave Absorption Properties in the C Band for the Nitrided Y<sub>2</sub>Fe<sub>12</sub>Co<sub>4</sub>Si/Paraffin Composites |
| title_full_unstemmed | Excellent Microwave Absorption Properties in the C Band for the Nitrided Y<sub>2</sub>Fe<sub>12</sub>Co<sub>4</sub>Si/Paraffin Composites |
| title_short | Excellent Microwave Absorption Properties in the C Band for the Nitrided Y<sub>2</sub>Fe<sub>12</sub>Co<sub>4</sub>Si/Paraffin Composites |
| title_sort | excellent microwave absorption properties in the c band for the nitrided y sub 2 sub fe sub 12 sub co sub 4 sub si paraffin composites |
| topic | nitriding microwave absorption rare earth soft magnetism |
| url | https://www.mdpi.com/2312-7481/11/7/54 |
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