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http://dx.doi.org/10.4150/KPMI.2007.14.4.261

Study of Electromagnetic Wave Absorption Properties with Particle Size in Soft Magnetic Alloy Powder  

Hong, S.H. (Department of Nano-systems Engineering, Inje University)
Sohn, K.Y. (Department of Nano-systems Engineering, Inje University)
Park, W.W. (Department of Nano-systems Engineering, Inje University)
Nam, J.M. (Korea Institute of Materials Science)
Moon, B.G. (Korea Institute of Materials Science)
Song, Y.S. (AMOSENSE)
Publication Information
Journal of Powder Materials / v.14, no.4, 2007 , pp. 261-264 More about this Journal
Abstract
The electromagnetic wave (EM) absorption properties of various particle size have been investigated in a sheet-type absorber using the $Fe_{73}Si_{16}B_{7}Nb_{3}Cu_{1}$ alloy powder. With decreasing the average particle size, the complex permeability (${\mu}_{r}$) and permittivity (${\varepsilon}_{r}$) increased and the matching frequency is shifted toward lower frequency. The fabricated EM wave absorbers showed permeability $2{\sim}6$, permittivity $17{\sim}23$ for a $-325{\sim}+400$ mesh sample, and the calculated power absorption was as high as 80% in the frequency range over 2 GHz.
Keywords
Electromagnetic wave absorption; Particle size; Complex permeability; Complex Permittivity;
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