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Fabrication of twisted multifilamentary BSCCO 2223 tapes by using high resistive sheath for AC application

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4 Author(s)
Jaimoo Yoo ; Korea Inst. of Machinery & Metals, Changwon, South Korea ; Jaewoong Ko ; Haidoo Kim ; Hyungsik Chung

For the application of high Tc superconductor to electric power systems, it is essential to reduce AC losses of BSCCO 2223 tapes. Different twist pitches of multifilamentary BSCCO 2223 tapes using high resistivity sheath were fabricated to investigate the effect of twist pitches on the microstructure and critical current property, as well as to study the possible use of these conductors for AC application. The J/sub cr/ values of 10 mm and 5 mm twisted tapes drop faster than that of untwisted and 20 mm twisted tapes under increasing magnetic field, especially in low field regime (0/spl sim/0.03 T). It suggests that weak links in the former are more serious than in the latter, which is in accordance with the microstructure analysis.

Published in:

Applied Superconductivity, IEEE Transactions on  (Volume:9 ,  Issue: 2 )