Application of cold isostatic pressing method for fabrication of SoG-Si powder compacts

태양전지급 폴리실리콘 성형체 제작을 위한 CIP법의 활용

  • 이호문 (한국생산기술연구원 주조기술연구부) ;
  • 신제식 (한국생산기술연구원 주조기술연구부) ;
  • 문병문 (한국생산기술연구원 주조기술연구부) ;
  • 권기환 (한국기술교육대학교 신소재공학과) ;
  • 김기영 (한국기술교육대학교 신소재공학과)
  • Published : 2009.06.25

Abstract

In this study, it was aimed to develop the re-use technology of ultra-fine silicon powders, by-products during the current production process of high purity poly-Si feedstock. For this goal, the compacts of the silicon powders were tried to fabricate by CIP (Cold Isostatic Pressing) method using silicon rubber mold without chemical binder materials. The density ratio of the silicon powder compacts reached 74%. In order to simulate the actual handling and charging conditions of feedstock material in casting process, a shaking test was carried out and mass loss measured. Finally, the silicon powder compacts were melted using a cold crucible induction melting method and the purity assessment was conducted by Hall effect measurement.

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