73.2Si16.2B6.6Nb3Cu1的合金并制備了非晶合金條帶,經(jīng)過高能球磨處理得到非晶合金粉體。研究了球磨處理時間對合金粉體軟磁性能、微觀結構、形貌和電磁波吸收性能的影響。結果表明,非晶合金粉體球磨后產(chǎn)生了α-(Fe,Si)相,提高了軟磁性能,飽和磁化強度最高可達137.94emu/g。非晶粉體形貌為橢球狀,隨球磨時間增加,合金粉體粒徑減小,提高了電磁波吸收性能,最小平均粒徑為8.42μm。合金具有優(yōu)異的電磁波吸收性能,電磁波損耗機制主要為磁損耗。球磨50h后的非晶合金粉體具有最佳的電磁波吸收性能,在頻率為4.57GHz處取得的最小反射損耗達到-42.26dB,吸波劑厚度為2.5mm時的最大有效吸收(<-10dB)帶寬高達5.78GHz。"/>

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Fe73.2Si16.2B6.6Nb3Cu1非晶合金粉體電磁屏蔽性能研究
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作者單位:

1.大連理工大學 材料科學與工程學院;2.大連理工大學寧波研究院;3.寧波中科院畢普拉斯新材料科技有限公司

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中圖分類號:

TG132

基金項目:

國家自然科學基金資助項目(51971049)；中央高?；究蒲袠I(yè)務費項目(DUT19GF110)


Electromagnetic shielding properties of Fe73.2Si16.2B6.6Nb3Cu1 amorphous alloy powders
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Affiliation:

1.Dalian University of Technology， School of Material Science and Engineering;2.Ningbo Research Institute of Dalian University of Technology;3.Ningbo Zhongke B Plus New Materials Technology Co,Ltd

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    摘要:

    為防控電磁污染問題,亟待開發(fā)更好的電磁屏蔽材料。本文設計了成分為Fe73.2Si16.2B6.6Nb3Cu1的合金并制備了非晶合金條帶,經(jīng)過高能球磨處理得到非晶合金粉體。研究了球磨處理時間對合金粉體軟磁性能、微觀結構、形貌和電磁波吸收性能的影響。結果表明,非晶合金粉體球磨后產(chǎn)生了α-(Fe,Si)相,提高了軟磁性能,飽和磁化強度最高可達137.94emu/g。非晶粉體形貌為橢球狀,隨球磨時間增加,合金粉體粒徑減小,提高了電磁波吸收性能,最小平均粒徑為8.42μm。合金具有優(yōu)異的電磁波吸收性能,電磁波損耗機制主要為磁損耗。球磨50h后的非晶合金粉體具有最佳的電磁波吸收性能,在頻率為4.57GHz處取得的最小反射損耗達到-42.26dB,吸波劑厚度為2.5mm時的最大有效吸收(<-10dB)帶寬高達5.78GHz。

    Abstract:

    In order to prevent and control electromagnetic pollution, it is urgent to develop effective electromagnetic shielding materials. In this paper, The Fe73.2Si16.2B6.6Nb3Cu1 alloy was designed and amorphous ribbons were prepared. After high-energy ball milling, amorphous alloy powder was obtained. The effects of ball-milling time on soft magnetic properties, microstructure, morphology and electromagnetic wave absorption properties of alloy powders were studied. The results showed that the crystalline phases α- (Fe, Si) was formed after ball milling, which improved the soft magnetic properties. The maximum saturation magnetization was 137.94emu/g. The morphology of the amorphous alloy powder was elliptical and the minimum average particle size is 8.42μm. The alloys showed excellent electromagnetic absorption performance. The loss mechanism of electromagnetic waves was mainly magnetic loss. After ball-milling for 50h, the amorphous alloy powder had the best electromagnetic absorption performance. The minimum reflection loss was -42.26dB at the frequency of 4.57GHz, and the maximum effective absorption bandwidth (<-10dB) was up to 5.78GHz when the thickness of the absorber was 2.5mm.

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吳佳麗,周秉文,霍利山,孟令剛,亞斌,張環(huán)月,張興國. Fe73.2Si16.2B6.6Nb3Cu1非晶合金粉體電磁屏蔽性能研究[J].稀有金屬材料與工程,2022,51(2):622~628.[Wu Jiali, Zhou Bingwen, Huo Lishan, Meng Linggang, Ya Bin, Zhang Huanyue, Zhan Xingguo. Electromagnetic shielding properties of Fe73.2Si16.2B6.6Nb3Cu1 amorphous alloy powders[J]. Rare Metal Materials and Engineering,2022,51(2):622~628.]
DOI：10.12442/j. issn.1002-185X.20210129

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  • 收稿日期:2021-02-16
  • 最后修改日期:2021-04-08
  • 錄用日期:2021-05-12
  • 在線發(fā)布日期: 2022-03-09
  • 出版日期: 2022-02-28