Browse > Article

Effects of Magnetic Powder Size on Electromagnetic Wave Absorption Characteristics in FeSiCr Flakes/Polymer Composite Sheets  

Noh, Tae-Hwan (School of Materials Science & Engineering, Andong National University)
Kim, Ju-Beom (School of Materials Science & Engineering, Andong National University)
Publication Information
Korean Journal of Metals and Materials / v.46, no.1, 2008 , pp. 44-51 More about this Journal
Abstract
The effects of magnetic powder size on electromagnetic wave absorption characteristics in Fe-6.5Si-0.9Cr(wt%) alloy flakes/polymer composite sheets available for quasi-microwave band have been investigated. The composite sheet including small magnetic flakes with the size less than $26{\mu}m$ exhibited high power loss in the GHz frequency range as compared with the sheets having large alloy flakes of $45{\sim}75{\mu}m$. Moreover, both the complex permeability and the loss factor increased with the decrease in size of the alloy flakes. The large power loss of the sheets containing small magnetic flakes was attributed to the high complex permeability, especially their imaginary part. The high complex permeability of the sheets composed of small flakes was considered to be due to the highly thin shape of the flakes inducing low eddy-current loss.
Keywords
electromagnetic wave absorption; FeSiCr flakes; composite sheets; magnetic powder size;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
Times Cited By Web Of Science : 1  (Related Records In Web of Science)
Times Cited By SCOPUS : 1
연도 인용수 순위
1 Y. Aikawa, and K. Yanagimoto, Sanyo Technical Report 9, 59 (2002).
2 Y. Hashimoto, and H. Kurihara, Engineering Materials 46, 36 (1998).
3 S. Yoshida, J. Magn. Soc. Jpn. 22, 1353 (1998).
4 S. Chikazumi, Physics of Ferromagnetism, 2nd ed., p.557, Oxford University Press, Oxford (1997).
5 R. A. McCurrie, Ferromagnetic Materials - Structures and Properties, p.26 & p.123, Academic Press, London (1994).
6 M. Sato, S. Yoshida, E. Sugawara, and Y. Shimada J. Magn. Soc. Jpn. 20, 421 (1996).   DOI
7 S. Chikazumi, Physics of Ferromagnetism, 2nd ed., p.561, Oxford University Press, Oxford (1997).
8 S. Yoshida, H. Ono, S. Ando, S. Ohnuma, M. Yamaguchi, and Y. Shimada, Materia Japan 42, 193 (2003).   DOI
9 K. Ohta, Fundamentals of Magnetic Engineering II, p.305, Kyoritsu, Tokyo (1973).
10 A. Goldman, Handbook of Modern Ferromagnetic Materials, p.128, Kluwer Academic Publishers, Dordrecht (1988).
11 S. Yoshida, S. Mitsuharu, E. Sunagawa, and Y. Shimada, J. Appl. Phys. 85, 4636 (1999).   DOI   ScienceOn
12 O. Hashimoto, Introduction to Wave Absorber, p.16, Morikita Publishing Co., Tokyo (1997).
13 T. H. Noh, Magnetic Materials, p.428, Dooyangsa, Seoul (2006).
14 1. S. Sugimoto, J. Magn. Soc. Jpn. 27, 862 (2003).
15 Y. Bizen, J. Sunakawa, S. Arakawa, and S. Takaoka, Hitachi Metals Technical Report 16, 39 2000).
16 A. Saito, M. Ogawa, K. Tutui, H. Endo, and S. Yahagi, Materia Japan 38, 46 (1999).   DOI
17 J. S. Benjamin, New Materials by Mechanical Alloying Techniques, p.3, DFG, Adenauerllee (1989).
18 S. Yoshida, M. Sato, and Y. Shimada, J. Magn. Soc. Jpn. 22, 1377 (1998).