Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
권호 표지
DOI QR코드

DOI QR Code

Electromagnetic Wave Absorption Behavior of a Fe-based Nanocrystalline Alloy mixed with a Ferrite Powder

Fe계 나노결정립 분말과 페라이트 복합체의 전자파 흡수특성

  • Koo, S.K. (School of Nano Engineering, Inje University) ;
  • Lee, M.H. (School of Nano Engineering, Inje University) ;
  • Moon, B.G. (Advanced Materials Research Division, Korea Institute of Materials Science) ;
  • Song, Y.S. (Research Institute, Amosense Co.) ;
  • Sohn, K.Y. (School of Nano Engineering, Inje University) ;
  • Park, W.W. (School of Nano Engineering, Inje University)
  • Published : 2008.08.28
Download PDF
⟨ Previous Next ⟩

Abstract

The electromagnetic (EM) wave absorption properties of the $Fe_{73}Si_{16}B_7Nb_3Cu_1$ nanocrystalline powder mixed with 5 to 20 vol% of Ni-Zn ferrites has been investigated in a frequency range from 100MHz to 10GHz. Amorphous ribbons prepared by a planar flow casting process were pulverized and milled after annealing at 425 for 1 hour. The powder was mixed with a ferrite powder at various volume ratios to tape-cast into a 1.0mm thick sheet. Results showed that the EM wave absorption sheet with Ni-Zn ferrite powder reduced complex permittivity due to low dielectric constant of ferrite compared with nanocrystalline powder, while that with 5 vol% of ferrite showed relatively higher imaginary part of permeability. The sheet mixed with 5 vol% ferrite powder showed the best electromagnetic wave absorption properties at high frequency ranges, which resulted from the increased imaginary part of permeability due to reduced eddy current.

Keywords

References

  1. S. Sugimoto, T. Maeda, D. Book, T. Kagotani, K. Inomata, M. Homma, H. Ota, Y. Houjou and R. Sato: J. Alloys. Comp., 330 (2002) 301 https://doi.org/10.1016/S0925-8388(01)01504-3
  2. J. R. Liu, M. Itoh, T. Horikawa, M. Itakura, N. Kuwano: and K. Machida J. Appl. Phys., 37 (2004) 2737 https://doi.org/10.1088/0022-3727/37/19/019
  3. T. H. Noh and J. B. Kim: J. Kor. Inst. Met & Mater., 46 (2008) 44 (Korean)
  4. D. S. Li, T. H. Horikawa, J. R. Liu, M. Itoh and K. Machida: J. Alloys Compd., 408 (2006) 1429 https://doi.org/10.1016/j.jallcom.2005.04.109
  5. H. J. Cho, E. K. Cho, Y. S. Song, S. K. Kwon, K. Y. Sohn and W. W. Park: Mater. Sci. Forum, 534 (2007) 1345 https://doi.org/10.4028/www.scientific.net/MSF.534-536.1345
  6. S. H. Hong, K. Y. Shon, W. W. Park, B. G. Moon and Y. S. Song: J. Korean Powder Metall. Inst., 15 (2008) 18 (Korean) https://doi.org/10.4150/KPMI.2008.15.1.018
  7. K. M. Lim, M. C. Kim, K. A. Lee and C. G. Park: J. Kor. Inst. Met & Mater., 41 (2003) 180 (Korean)
  8. Y. Yoshizawa, S. Oguma and K. Yamauchi: J. Appl. Phys., 64 (1988) 6044 https://doi.org/10.1063/1.342149
  9. F. Mazaleyrat and L. K. Varga: J. Magn & Magn Mater., 215-216 (2000) 253 https://doi.org/10.1016/S0304-8853(00)00128-1
  10. http://en.wikipedia.org/wiki/permittivity#Lossy_medium
  11. McGraw-Hill: Encyclopedia of Physics, S. P. Parker (Ed.), 5th ed, New York (1983) 232
  12. http://cp.literature.agilent.com/litweb/pdf/5965-7917E.pdf, Agilent Technical Report No.5965-7917E
  13. A. Hosoe, K. Nitta, S. Inazawa, K. Yamada, T. Yoshisaka and K. Ikeda: SEI Tech. Rev., 54 (2002) 20