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

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Nuclear Science and Techniques 2020年第3期31卷 10-19页

作者： Yu-Hua Lv Yan-Hui Zhang Jian Zhang Bin Li School of Materials Science and Engineering Key Laboratory for Anisotropy and Texture of MaterialsMinistry of EducationNortheastern UniversityShenyang 110819China State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang 110819China Institute of Advanced Magnetic Materials Hangzhou Dianzi UniversityHangzhou 310012China School of Life Sciences Huzhou UniversityHuzhou 313000China

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 ***,it is necessary to study further the effects of the particle size on such parameters and improve the microwave absorption performance of Febased nanocrystalline *** this study,Fe-B-P particles were prepared through a synthetic approach consisting of an aqueous chemical reduction and a ball milling *** investigated the effects of ball milling on the microstructure and electromagnetic properties of Fe-B-P *** experimental results indicate that the Fe-B-P particles synthesized through an aqueous chemical reduction are amorphous ***-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 *** results of the Mo¨ssbauer spectra show that a portion of the small particles demonstrate a superparamagnetic *** volume proportions of the superparamagnetic component increase from 13.1 to 15.8%as the treatment time *** measured the permittivity and permeability spectra of Fe-B-P particles within the frequency range of 2-18 *** reflection loss(RL)is-10 dB for an absorber thickness of 1.7-5.0 *** RL is-20 dB for an absorber thickness of 1.9-2.7 *** 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.

关键词： Fe-B-P particles Mossbauer spectroscopy microwave absorber properties

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M?ssbauer spectroscopy studies on the particle size distribution effect of Fe–B–P amorphous alloy on the microwave absorption properties

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Nuclear Science and Techniques 2020年第3期31卷 61-70页

作者： Yu-Hua Lv Yan-Hui Zhang Jian Zhang Bin Li School of Materials Science and Engineering Key Laboratory for Anisotropy and Texture of Materials Ministry of Education Northeastern University State Key Laboratory of Rolling and Automation Northeastern University Institute of Advanced Magnetic Materials Hangzhou Dianzi University School of Life Sciences Huzhou University

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 Febased 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 after0.5 h of ball milling, and subsequently, the particles become smaller with increases in the milling time, with traces of Fe2O3generated on the particle surface. The results of the M?ssbauer spectra show that a portion of the small particles demonstrate a superparamagnetic *** 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 of2–18 GHz. The reflection loss(RL) is-10 dB for an absorber thickness of 1.7–5.0 mm. The RLis-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.

关键词： Fe–B–P particles M?ssbauer spectroscopy microwave absorber properties

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