Proceedings of the Korea Institute of Applied Superconductivity and Cryogenics Conference (한국초전도저온공학회:학술대회논문집)

The Korean Society of Superconductivity and Cryogenics (한국초전도저온학회)
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Study on fabrication process of long length of Bi-2223/Ag MTS wires for high critical current

Bi-2223/Ag HTS 장선재의 Ic 특성 향상 공정 연구

  • 하동우 (한국전기연구원 초전도응용연구그룹) ;
  • 양주생 (한국전기연구원 초전도응용연구그룹) ;
  • 황선역 (한국전기연구원 초전도응용연구그룹) ;
  • 이동훈 (한국전기연구원 초전도응용연구그룹) ;
  • 최정규 (한국전기연구원 초전도응용연구그룹) ;
  • 하홍수 (한국전기연구원 초전도응용연구그룹) ;
  • 오상수 (한국전기연구원 초전도응용연구그룹) ;
  • 권영길 (한국전기연구원 초전도응용연구그룹)
  • Published : 2003.02.01
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Abstract

Long length of Bi-2223 superconducting wires were fabricated by stacking, drawing process with different precursor owders and different heat-treatment histories. The precursor powders were 2 kinds of Pb content. And a part of the tapes were experienced pre-annealing process which caused tetragonal structure of Bi-2212 phase to orthorhombic structure of it was during drawing process. We confirmed the transformation of Bi-2212 phase from tetragonal structure to orthorhombic structure and reduction of second phases. We designed and made a continuous Ic measurement system for Bi-2223/Ag HTS tape. We could achieve best Ic of 65 A at the Bi-2223/Ag tape using low Pb content of precursor powder and experienced pre-annealing process.

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