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Study on commercialization process of Bi-B223 HTS tape  

하동우 (한국전기연구원 초전도재료연구그룹)
김상철 (넥상스코리아 기술연구소)
오상수 (한국전기연구원 초전도재료연구그룹)
하홍수 (한국전기연구원 초전도재료연구그룹)
이동훈 (한국전기연구원 초전도재료연구그룹)
양주생 (한국전기연구원 초전도재료연구그룹)
황선역 (한국전기연구원 초전도재료연구그룹)
Publication Information
Progress in Superconductivity and Cryogenics / v.6, no.1, 2004 , pp. 1-5 More about this Journal
Abstract
Long length of Bi-2223/Ag superconducting wives were fabricated by stacking and drawing process with advanced heat-treatment schedules. Intermediate annealing was carried out to increase the homogeneity and uniformity of the superconducting filaments embedded in the silver matrix. Phase modification from tetragonal to orthorhombic Bi-2212 by pre heat treatment(PHT) was executed to improve the texture and phase transformation of Bi-2223. Drawing stress was measured to predict the sausaging and stress limit. Rolling Parameters such as thickness. width and winding tension were investigated to roll the tape with uniformity. 1 km length of Bi-2223/Ag superconducting wires were fabricated without any breakage. Critical current (Je) of 270 m length of superconducting tapes was measured over than $70 A/cm^2$ continuously after final sintering.
Keywords
Bi-2223/Ag superconductor; longlength; Heat-treatment; critical current;
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