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

The Korean Society of Superconductivity and Cryogenics (한국초전도저온학회)
권호 표지

A Study on Bubbling Control of Bi-2223/Ag HTS tapes

Bi-2223/Ag 고온초전도 선재의 bubbling 제어에 관한 연구

  • 하홍수 (한국전기연구원 초전도응용연구그룹) ;
  • 오상수 (한국전기연구원 초전도응용연구그룹) ;
  • 하동우 (한국전기연구원 초전도응용연구그룹) ;
  • 송규정 (한국전기연구원 초전도응용연구그룹) ;
  • 김상철 (대성전선(주) 기술연구소) ;
  • 권영길 (한국전기연구원 초전도응용연구그룹) ;
  • 류강식 (한국전기연구원 초전도응용연구그룹)
  • Published : 2001.02.01
Download PDF
⟨ Previous Next ⟩

Abstract

Bi-2223/Ag HTS tapes fabricated by PIT process are used to make the power transmission cable, motor, fault current limiter, transformer etc. But some problems are still remained as like bubbling, sausaging to got the high Jc. In this study. we carried out the experiment to prevent bubbling in the HTS tape. The bubbling mainly occurred when HTS tape was heat-treating. Therefore, additional vacuum annealing at 400 ~ $600^{\circ}C$and slowly ramp-up sintering method were used to decrease the bubbling. slowly ramp-up sintering was more effective to decrease the bubbling than the vacuum annealing, but Jc was also decreased after heat treatment. Optimum ramp-up sintering schedule was searched to get the high critical current and prevent bubbling at same time.

Keywords