Researches on the Optimization of Cold Pressing of Ag-clad Bi-2223 Superconducting Tapes

Ma Yanwei; Wang Xianjin; Wang Zutang

doi:10.13374/j.issn1001-053x.1998.06.006

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Ma Yanwei, Wang Xianjin, Wang Zutang. Researches on the Optimization of Cold Pressing of Ag-clad Bi-2223 Superconducting Tapes[J]. Chinese Journal of Engineering, 1998, 20(6): 531-535. doi: 10.13374/j.issn1001-053x.1998.06.006

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Ma Yanwei, Wang Xianjin, Wang Zutang. Researches on the Optimization of Cold Pressing of Ag-clad Bi-2223 Superconducting Tapes[J]. Chinese Journal of Engineering, 1998, 20(6): 531-535. doi: 10.13374/j.issn1001-053x.1998.06.006

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Researches on the Optimization of Cold Pressing of Ag-clad Bi-2223 Superconducting Tapes

doi: 10.13374/j.issn1001-053x.1998.06.006

1. Material Science and Engineering School, UST Beijing, Beijing 100083, China;
2. Tsinghua University, Beijing 100084

Received Date: 1998-03-25
Available Online: 2021-08-27

Abstract

Abstract

Optimum researches of cold pressing of Ag-clad Bi-2223 superconducting tapes fabricated by Powder-in-tube method were carried out. Cold pressing was necessary to produce tapes with good texture and high J_c values. The optimum technical parameters are sintering three times at 838℃ for 60h and pressing twice with pressure 2.0GPa and 2.5GPa for the first and second compaction respectively. Reduction rate of cold pressing is 1.5×10^-4mm/s. Meanwhile, experimental results exhibited that high density and degree of grain alignment of the tapes are mainly attributed to cold perssing.
- Bi-based superconducting tapes,
- cold pressing,
- critical current density