Journal of the Korean Magnetics Society (한국자기학회지)

The Korean Magnetics Society (한국자기학회)
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Complex Permeability of 0-3 Polymer Magnetic Composites for Near-Field Communication

근역장 통신용 0-3형 고분자 자성 복합소재의 복소투자율 변화

  • Nam, Joong-Hee (Electronic Materials Convergence Division, Korea Institute of Ceramic Eng. and Tech.) ;
  • Lim, Choong Hyuck (Electronic Materials Convergence Division, Korea Institute of Ceramic Eng. and Tech.) ;
  • Yun, Ji Sun (Electronic Materials Convergence Division, Korea Institute of Ceramic Eng. and Tech.) ;
  • Jeong, Young-Hun (Electronic Materials Convergence Division, Korea Institute of Ceramic Eng. and Tech.) ;
  • Cho, Jeong-Ho (Electronic Materials Convergence Division, Korea Institute of Ceramic Eng. and Tech.) ;
  • Paik, Jong Hoo (Electronic Materials Convergence Division, Korea Institute of Ceramic Eng. and Tech.) ;
  • Kim, Hyo Tae (Basic Materials Convergence Division, Korea Institute of Ceramic Eng. and Tech.) ;
  • Kim, Jong-Hee (Basic Materials Convergence Division, Korea Institute of Ceramic Eng. and Tech.)
  • 남중희 (한국세라믹기술원 전자소재융합본부) ;
  • 임충혁 (한국세라믹기술원 전자소재융합본부) ;
  • 윤지선 (한국세라믹기술원 전자소재융합본부) ;
  • 정영훈 (한국세라믹기술원 전자소재융합본부) ;
  • 조정호 (한국세라믹기술원 전자소재융합본부) ;
  • 백종후 (한국세라믹기술원 전자소재융합본부) ;
  • 김효태 (한국세라믹기술원 기초소재융합본부) ;
  • 김종희 (한국세라믹기술원 기초소재융합본부)
  • Received : 2012.11.19
  • Accepted : 2012.12.11
  • Published : 2012.12.31
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Abstract

Magnetic properties of composite materials consisting of polymer filled with ferromagnetic powders (MnZn ferrite, Fe-Si alloy) were investigated in this study. The volume fraction of magnetic powders as fillers was varied from 70 % to 95 %. This paper presents the fabrication method of polymer magnetic composites in an effort to produce the 0-3 types of MnZn ferrite and FeSi as fillers with a proper complex permeability through the optimization of some experimental parameters. The polymer matrix composites were prepared by mixing the crushed ferrites and flaky FeSi powders homogenously with low-density resins (EPDM, epoxy). The relationships among the manufacturing technology of these materials, their filler volume fraction, as well as their complex permeability were measured and analyzed.

이 연구에서는 근역장 통신(NFC)용 소재로 응용하기 위해, MnZn 페라이트와 FeSi 합금 분말을 filler로 사용하여 제조한 0-3형 자성복합소재의 복소투자율 변화(1 MHz~1 GHz)를 측정하였으며, RFID 주파수(13.56 MHz)에서의 복소투자율 값을 검토한 결과, filler 함량에 따라 투자율 실수항은 증가하고 허수항은 감소하는 결과를 얻었다. 즉, 시트형 자성복합소재의 응용을 위한 연구 결과로서, 고투자율을 나타내면서 손실항인 허수항을 상대적으로 낮출 수 있는 소재 제조공정 기술을 확보할 수 있었으며, 복소투자율 변화는 자성분말 filler의 성분과 입자 형태, 그리고 polymer 종류에 의존함을 알 수 있었다.

Keywords

References

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