The effect of pre-treatment on superconducting property and deformation of Bi-2223/Ag tapes.

Bi-2223/Ag 고온초전도 선재의 전처리에 따른 가공성 및 초전도 특성

  • 하홍수 (한국전기연구원 초전도응용연구그룹) ;
  • 이동훈 (한국전기연구원 초전도응용연구그룹) ;
  • 최정규 (한국전기연구원 초전도응용연구그룹) ;
  • 황선역 (한국전기연구원 초전도응용연구그룹) ;
  • 양주생 (한국전기연구원 초전도응용연구그룹) ;
  • 김상철 (넥상스 코리아 기술 연구소) ;
  • 하동우 (한국전기연구원 초전도응용연구그룹) ;
  • 오상수 (한국전기연구원 초전도응용연구그룹) ;
  • 권영길 (한국전기연구원 초전도응용연구그룹)
  • Published : 2003.05.23

Abstract

Pre-treatment of Bi-2223/Ag tapes has been investigated to improve the superconducting property and grain alignment. However, rolling deformability of Bi-2223/Ag wires was degraded by the breakage of Ag alloy sheath after pre-treatment. Various pre-treatment conditions were tried to prevent the problem of sliver sheath and improve the superconducting property of Bi-2223/Ag tapes. Filament precursor of Bi-2223/Ag tapes was modified to be textured easily during main sintering by the optimum pre-treatment with low oxygen pressure and up to $800^{\circ}C$. Critical current was also increased up to 20% than that of no pre-treated tape.

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