Investigation of the Effect of Alloying Element Equilibrium Relationship on the Electromagnetic Microwave Absorption Properties of Nano FeNi Magnetic Particles

Wenqi Xu, Hongyang Li*, Hong Li, Zhenfeng Shen, Shentao Zeng, Feng Yang, Qing Cai, Ran Wang, Jiayou Guo, Cui Luo, Ying Liu

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

摘要

In order to effectively comprehend the impact of alloying element equilibrium relationship of binary nano-magnetic particles on their electromagnetic wave absorption performance, four sets of binary nano FeNi magnetic particles with Fe:Ni alloy ratios of 2:8, 4:6, 6:4, and 8:2 were prepared with liquid-phase reduction and the microstructure, static magnetic properties, and electromagnetic wave absorption performance of the particles were studied. The results show that the nano FeNi magnetic particles exhibit a spherical geometric structure, with a decrease in crystallinity as the Fe:Ni alloy ratio increases. The remanence and coercivity initially increase and then decrease with the increased Fe:Ni alloy ratio, with a 270 % decrease in saturation magnetization intensity as the alloy ratio changes from 2:8 to 8:2. With the increase in the Fe:Ni alloy ratio, the real and imaginary parts of the complex permittivity exhibit a decreasing trend, while the real part of the magnetic permeability decreases with increasing frequency. Aside from the 8:2 Fe:Ni alloy ratio, significant polarization relaxation losses were observed in the prepared magnetic particles, with eddy current losses was not the main mechanism of magnetic losses. The attenuation constant shows a peak at high frequencies, and the impedance matching performance increases with the increase in the Fe:Ni alloy ratio. When the Fe:Ni alloy ratio changes from 2:8 to 8:2, the minimum reflection loss decreased by 3340 %, and at a thickness of 2.1 mm and a frequency of 12 GHz, the FeNi alloy particles with a ratio of 2:8 exhibited a minimum reflection loss of −17.2 dB with an effective absorption bandwidth of 1.92 GHz.

源语言英语
文章编号e202402412
期刊ChemistrySelect
9
33
DOI
出版状态已出版 - 4 9月 2024

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Xu, W., Li, H., Li, H., Shen, Z., Zeng, S., Yang, F., Cai, Q., Wang, R., Guo, J., Luo, C., & Liu, Y. (2024). Investigation of the Effect of Alloying Element Equilibrium Relationship on the Electromagnetic Microwave Absorption Properties of Nano FeNi Magnetic Particles. ChemistrySelect, 9(33), 文章 e202402412. https://doi.org/10.1002/slct.202402412