Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference (한국전기전자재료학회:학술대회논문집)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Characteristics of Bi-based High $T_c$ Superconducting Current Lead

Bi계 고온초전도 전류 리드의 특성

  • 백승명 (경상대학교 공과대학 전기공학과) ;
  • 이병성 (경상대학교 공과대학 전기공학과) ;
  • 김영석 (경상대학교 공과대학 전기공학과) ;
  • 곽민환 (경상대학교 공과대학 전기공학과) ;
  • 김상현 (경상대학교 공과대학 전기공학과)
  • Published : 1999.05.01
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Abstract

We have fabricated and tested a Bi-based high temperature superconducting current lead system. Ag sheathed Bi-2223 mono-filament tapes of $I_c=8.4$ A at 77 K under self-field condition were fabricated using powder-in-tube(P1T) method. Multi-layer current leads can be made by stacking of Ag sheathed Bi-2223 mono-filament wires. The critical current of this 10-layer current lead is about 68 A. The contact resistance across the copper-current lead interface has been studied using current-voltage characteristics. At temperature below critical temperature the resistive contribution of the interface to the total contact resistance dominates. We have measured AC transport losses in a current lead at 77 K, 60 Hz by a transport method.

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