Abstract
Based on the two-powder process, the relationship between the heat treatment conditions and the inhomogeneity in the core microstructure and the 2223 phase content was investigated upon sintering the Bi-2223 long tapes. Several methods were proposed to improve the critical current homogeneity of long tapes. Using the process, a 50 metres long tape with highly current uniformity was fabricated. The Ic values is 60A (Jc∼3.5×104A/cm2, 77K, Self-field) for this tape and the its values deviation is less than 8% along the tape length.
Original language | English |
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Pages (from-to) | 424 |
Number of pages | 1 |
Journal | Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering |
Volume | 30 |
Issue number | SUPPL. |
State | Published - 2001 |
Externally published | Yes |
Keywords
- Heat treatment homogeneity
- Long-length Bi-2223 tapes
- Two-powder process