Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Electromagnetic Wave Absorption Properties of Fe-based Nanocrystalline P/M sheets with Al2O3 additive

Al2O3 첨가에 따른 Fe계 나노결정립 P/M시트의 전자파 흡수특성

  • Woo, S.J. (School of Nano-System Engineering, Inje University) ;
  • Cho, E.K. (School of Nano-System Engineering, Inje University) ;
  • Cho, H.J. (School of Nano-System Engineering, Inje University) ;
  • Lee, J.J. (School of Nano-System Engineering, Inje University) ;
  • Sohn, K.Y. (School of Nano-System Engineering, Inje University) ;
  • Park, W.W. (School of Nano-System Engineering, Inje University)
  • 우수정 (인제대학교 공과대학 나노공학부) ;
  • 조은경 (인제대학교 공과대학 나노공학부) ;
  • 조현정 (인제대학교 공과대학 나노공학부) ;
  • 이재준 (인제대학교 공과대학 나노공학부) ;
  • 손근용 (인제대학교 공과대학 나노공학부) ;
  • 박원욱 (인제대학교 공과대학 나노공학부)
  • Published : 2007.08.28
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Abstract

Electromagnetic wave absorbing materials have been developed to reduce electromagnetic interference (EMI) for electronic devices in recent years. In this study, Fe-Si-B-Nb-Cu base amorphous strip was pulverized using a jet mill and an attritor and heat-treated to get flake-shaped nanocrystalline powders, and then the powders were mixed, cast and dried with dielectric $Al_{2}O_{3}$ powders and binders. As a result, the addition of $Al_{2}O_{3}$ powders improved the absorbing properties of the sheets noticeably compared with those of the sheets without dielectric materials. The sheet mixed with 2 wt% $Al_{2}O_{3}$ powder showed the best electromagnetic wave absorption, which was caused by the increase of the permittivity and the electric resistance due to the dielectric materials finely dispersed on the Fe-based powder.

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References

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