Journal of the Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회논문지)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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The Effect of Silane and Dispersant on the Packing in the Composite of Epoxy and Soft Magnetic Metal Powder

실란 및 분산제가 Epoxy와 연자성 금속 파우더 복합체의 Packing에 미치는 영향

  • Lee, Chang Hyun (Nano Convergence Materials Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Shin, Hyo Soon (Nano Convergence Materials Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Yeo, Dong Hun (Nano Convergence Materials Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Nahm, Sahn (Department of Materials Science and Engineering, Korea University)
  • 이창현 (한국세라믹기술원 나노융합소재센터) ;
  • 신효순 (한국세라믹기술원 나노융합소재센터) ;
  • 여동훈 (한국세라믹기술원 나노융합소재센터) ;
  • 남산 (고려대학교 신소재공학과)
  • Received : 2017.10.10
  • Accepted : 2017.10.13
  • Published : 2017.12.01
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Abstract

A molding-type power inductor is an inductor that uses a hybrid material that is prepared by mixing a ferrite metal powder coated with an insulating layer and an epoxy resin, which is injected into a coil-embedded mold and heated and cured. The fabrication of molding-type inductors requires various techniques such as for coil formation and insertion, improving the magnetic properties of soft magnetic metal powder, coating an insulating film on the magnetic powder surface, and increasing the packing density by well dispersing the powder in the epoxy resin. Among these aspects, researches on additives that can disperse the metal soft magnetic powder having the greatest performance in the epoxy resin with high charge have not been reported yet. In this study, we investigated the effect of silanes, KBM-303 and KBM-403, and a commercial dispersant on the dispersion of metal soft magnetic powders in epoxy resin. The sedimentation height and viscosity were measured, and it was confirmed that the silane KBM-303 was suitable for dispersion. For this silane, the packing density was as high as about 72.49%. Moreover, when 1.2 wt% of dispersant BYK-103 was added, the packing density was about 80.5%.

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References

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