PROCESSING AND FABRICATION OF BI2SR2CACU2OY/AG TAPES AND SMALL-SCALE COILS

被引：39
作者：
SHIMOYAMA, JI
KADOWAKI, K
KITAGUCHI, H
KUMAKURA, H
TOGANO, K
MAEDA, H
NOMURA, K
机构：
[1] NATL RES INST MET, TSUKUBA, IBARAKI 305, JAPAN
[2] HITACHI CABLE LTD, ADV RES CTR, TSUCHIURA, IBARAKI 300, JAPAN
来源：
APPLIED SUPERCONDUCTIVITY | 1993年 / 1卷 / 1-2期
关键词：
Dip-coating method - Pancake coils - Small scale coils;
D O I：
10.1016/0964-1807(93)90380-K
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Optimization of heat treatment conditions for a Bi2Sr2CaCu2Oy(Bi-2212)/Ag melt-solidified tape was carried out. Effects of the maximum temperature for partial melting, cooling rate in solidifying process, cooling rate after the melt-solidification and partial pressure of oxygen on J(c) were examined. A tape prepared under optimized conditions showed a high J(c) value of 2.4 x 10(5) A/cm2 at 4.2 K in 12 T. Small pancake coils were fabricated using Bi-2212/Ag long tapes prepared by a continuous dip-coating method. The generated field of a coil was higher than 1 T at 4.2 K in bias fields less than 4 T and its critical current remained greater than 200 A even at 20 K under zero bias field. This means that the Bi-2212/Ag coil has sufficient potential for practical use as a superconducting magnet at 20 K.
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收藏
页码：43 / 51
页数：9
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