Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Effect of Additives on Electromagnetic Properties in EMI Noise Filters for High Frequency Region

고주파 대역 EMI 노이즈 필터 제조시 전자기적 특성에 미치는 첨가물 효과

  • 박진채 (고려대학교 재료공학과) ;
  • 김병호 (고려대학교 재료공학과) ;
  • 김왕섭 (한국과학기술연구원 세라믹공정실) ;
  • 김경용 (한국과학기술연구원 세라믹공정실)
  • Published : 1992.08.01
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Abstract

Effects of additives on electromagnetic properties of a Ni-Cu-Zn ferrite for a noise filter in high frequency regions were studied. Both resistivity and permeability were increased with the amount of Mn2O3 up to 1wt%, then decreased with further addition. Addition of Co2O3 decreased the permeability of the ferrite and shifted the resonance frequency to a higher frequency region, which was thought due to the stabilization of domain walls. Therefore it was possible to improve both the permeability and the loss and to control the cut-off frequency by the concurrent addition of Mn2O3 and Co2O3.

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References

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