Proceedings of the Korea Institute of Applied Superconductivity and Cryogenics Conference (한국초전도저온공학회:학술대회논문집)
- 2003.02a
- /
- Pages.105-108
- /
- 2003
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
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.
Keywords