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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish
Article numbere202402412
JournalChemistrySelect
Volume9
Issue number33
DOIs
Publication statusPublished - 4 Sept 2024

Keywords

  • Alloying element ratio
  • Electromagnetic absorption properties
  • Magnetic properties
  • Nano FeNi particles

Fingerprint

Dive into the research topics of 'Investigation of the Effect of Alloying Element Equilibrium Relationship on the Electromagnetic Microwave Absorption Properties of Nano FeNi Magnetic Particles'. Together they form a unique fingerprint.

Cite this