Particle Size Effects on Complex Permeability and Electromagnetic Wave Absorption Properties of Amorphous Alloy-Epoxy Composites

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The electromagnetic wave absorption properties of amorphous alloy-epoxy composites have been investigated utilizing various amorphous alloy particle sizes in quasi-microwave frequency. The composite fabricated with small sized particle (< 26 μm) only revealed good absorption properties above 20dB with a thin thickness less than 6 mm. As particle size decreased, absorber had thinner matching thickness mainly due to increasing matching frequency. Such a variation of matching frequency was resulted from resonance frequency variation. The magnetic relaxation of the composites with small particle (< 38 μm) was contributed to magnetic resonance induced by demagnetization field. The eddy current also affected on the magnetic relaxation of the composites with large particle (> 38 μm) due to their large conductivity.

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Periodical:

Materials Science Forum (Volumes 539-543)

Main Theme:

Edited by:

T. Chandra, K. Tsuzaki, M. Militzer , C. Ravindran

Pages:

1022-1027

Citation:

K. M. Lim et al., "Particle Size Effects on Complex Permeability and Electromagnetic Wave Absorption Properties of Amorphous Alloy-Epoxy Composites", Materials Science Forum, Vols. 539-543, pp. 1022-1027, 2007

Online since:

March 2007

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$38.00

[1] A. Tsaliovich : Electromagnetic shielding handbook for wired and wireless EMC application (Kluwer Academic Publishier, 1999).

[2] O. Hashimoto : Recent technologies for new wave absorber and its applications (Shiemushi, Japan, 1999).

[3] K. Ishino and Y. Narumity: Amer. Ceram. Soc. Bull. Vol. 66 (1987) p.1469.

[4] J.Y. Shin and J.H. Oh : IEEE Trans. Magn. Vol. 29 (1993) p.3437.

[5] M.B. Amin and J.R. james : Radio Electro. Eng. Vol. 51 (1981) p.209.

[6] Y. Naito and K. Suetake : IEEE Tans. MTT Vol. 19 (1971), p.65.

[7] D. Jiles : Introduction to magnetism and magnetic materials (Chapman and Hall, 1991).

[8] T. Kasagi, T. Tsutaoka and K. Hatakeyama : IEEE Trans. Magn. Vol. 35 (1999) p.3424.

[9] S. Yoshida, M. Sato, E. Sugawara and Y. Shimada : J. Appl. Phys. Vol. 85 (1999) p.4636.

[10] K.H. Haek and W.S. Park : Asia-pacific microwave conference digest (1995) p.174.

[11] K.C. Han, W.S. Kim and K.Y. Kim : IEEE Trans. Magn. Vol. 31 (1995) p.2285.

[12] V. legar, C. Ramiarinjaona, R. Barrue, and R. Lebourgeois : J. Magn. Magn. Mater. Vol. 191 (1999) p.169.

[13] T. Tsutaoka, M. Ueshima and T. Nakamura : J. Appl. Phys. Vol. 78 (1995) p.3983.

[14] A. Malliaris and D.T. Turner, J. Appl. Phys. Vol. 42 (1971) p.614.