J. Mater. Sci. Technol. ›› 2011, Vol. 27 ›› Issue (2): 170-174.

• Research Articles • 上一篇    下一篇

Electron structure and microwave absorbing ability of flaky FeSiAl powders

T.D. zhou1,L.J. Deng2,D.F. Liang2   

  1. 1. Xihua University
    2.
  • 收稿日期:2009-08-27 出版日期:2011-02-28 发布日期:2011-02-28
  • 通讯作者: T.D. zhou

Electron Structure and Microwave Absorbing Ability of Flaky FeSiAl Powders

T.D. Zhou1), D.F. Liang2), L.J. Deng2), D.C. Luan1)   

  1. 1) Xihua University, Chengdu 610039, China
    2) State Key Laboratory of Electronic Thin Films & Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China
  • Received:2009-08-27 Online:2011-02-28 Published:2011-02-28
  • Contact: T.D. Zhou

RichHTML

0

摘要： Soft magnetic metallic material has been widely used for absorbing electromagnetic wave. Flaky Fe86-tSitAl14 (t =9, 11, 14 and 16) alloys powders are prepared from melt-quenched ribbons by annealing and milling. In a previous report we discussed the order-disordered structure of this alloys. In this article, we studied their electron structure. Covalence electron numbers of (111) and (100) plane increase with increasing Si content but Bohr magnetons decrease. Complex permittivity and complex permeability are both decreased with increasing t. The lowest value of reflectivity among the four alloys is originated from Fe70Si14Al14. The peak values of reflectivity are all lower than -10dB, and the absorbing frequency range (R<-10dB) increases from 1 to 2GHz when t reaches to 16.

Abstract: Soft magnetic metallic materials have been widely used for absorbing electromagnetic wave. Flaky Fe86-tSitAl14 (t=9, 11, 14 and 16) alloys powders were prepared from melt-quenched ribbons by annealing and milling. In a previous report we discussed the order-disordered structure of this alloys. In this article, we studied their electron structure. Covalence electron numbers of (111) and (100) plane increase with increasing Si content but Bohr magneton decreases. Complex permittivity and complex permeability are both decreased with increasing Si content t. The lowest value of reflectivity among the four alloys is originated from Fe70Si14Al14. The peak values of reflectivity are all lower than -10 dB, and the absorbing frequency range (R<-10 dB) increases
from 1 to 2 GHz when t reaches 16.

Key words: Flaky powders, Specific saturation magnetism, Bohr magneton, Absorbing ability