Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2020, Vol. 31 ›› Issue (3): 24 doi: 10.1007/s41365-020-0734-8

• ACCELERATOR, RAY AND APPLICATIONS • Previous Articles     Next Articles

Mössbauer spectroscopy studies on the particle size distribution effect of Fe-B-P amorphous alloy on the microwave absorption properties

Yu-Hua Lv1 • Yan-Hui Zhang1,2 • Jian Zhang3 • Bin Li4   

  1. 1 School of Materials Science and Engineering, Key Laboratory for Anisotropy and Texture of Materials, Ministry of Education, Northeastern University, Shenyang 110819, China
    2 State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, China
    3 Institute of Advanced Magnetic Materials, Hangzhou Dianzi University, Hangzhou 310012, China
    4 School of Life Sciences, Huzhou University, Huzhou 313000, China
  • Received:2019-08-17 Revised:2020-01-04 Accepted:2020-01-14
  • Contact: Yan-Hui Zhang
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (Nos. 51401049, U1704253), Natural Science Foundation of Zhejiang Province (No. LR18E010001), and Key Research and Development Program of Zhejiang Province (No. 2019C01121).
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Yu-Hua Lv, Jian Zhang, Bin Li, Yan-Hui Zhang. Mössbauer spectroscopy studies on the particle size distribution effect of Fe-B-P amorphous alloy on the microwave absorption properties.Nuclear Science and Techniques, 2020, 31(3): 24     doi: 10.1007/s41365-020-0734-8

Abstract: An Fe-based nanocrystalline alloy powder is important for application in microwave absorption, and the particle size has a critical impact on the electromagnetic microwave parameters. Therefore, it is necessary to study further the effects of the particle size on such parameters and improve the microwave absorption performance of Fe-based nanocrystalline powers. In this study, Fe–B–P particles were prepared through a synthetic approach consisting of an aqueous chemical reduction and a ball milling treatment. We investigated the effects of ball milling on the microstructure and electromagnetic properties of Fe–B–P particles. The experimental results indicate that the Fe–B–P particles synthesized through an aqueous chemical reduction are amorphous spheres. Fe–B–P particles with an original particle size of 200–1200 nm can be milled into an irregular shape with the size reduced to < 500 nm after 0.5 h of ball milling, and subsequently, the particles become smaller with increases in the milling time, with traces of Fe2O3 generated on the particle surface. The results of the Mössbauer spectra show that a portion of the small particles demonstrate a superparamagnetic property. The volume proportions of the superparamagnetic component increase from 13.1 to 15.8% as the treatment time increases. We measured the permittivity and permeability spectra of Fe–B–P particles within the frequency range of 2–18 GHz. The reflection loss (RL) is − 10 dB for an absorber thickness of 1.7–5.0 mm. The RL is − 20 dB for an absorber thickness of 1.9–2.7 mm. The microwave absorption properties of samples with the same thickness are improved with an increase in the treatment time and are shifted to a higher frequency, which will broaden the bandwidth of the absorption as well.

Key words: Fe–B–P particles, M?ssbauer spectroscopy, Microwave absorber properties