Voltage vs. current characteristics of Bi-2212/Ag tapes and coils

被引：3
|
作者：
Kumakura, H [1 ]
Kitaguchi, H
Miao, H
Togano, K
Koizumi, T
Hasegawa, T
机构：
[1] Natl Res Inst Met, Tsukuba, Ibaraki 3050047, Japan
[2] Showa Elect Wire & Cable Co Ltd, Kawasaki, Kanagawa 2108660, Japan
来源：
PHYSICA C | 2000年 / 335卷 / 1-4期
关键词：
Bi2Sr2CaCu2Ox; microstructure; n-value;
D O I：
10.1016/S0921-4534(00)00137-4
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Recently: we developed as: Pre-Annealing and Intermediate Rolling (PAIR) process which significantly increased J(c) values of Br-2212/Ag tapes. In this paper, we evaluate E-J characteristics of PAIR-processed and non-PAIR-processed Bi-2212/Ag tapes. Slope of the log E-log J curve (n-value) of short tapes was much enhanced by the PAIR process. Comparison of E-J curves measured by the resistive method and magnetic method suggests that this improvement is due to the improvement of the microstructure rather than to the improvement of flux pinning characteristics. n-Values of an XO-m-long PAIR-processed tape were also larger than those of a non-PAIR-processed tape. However, the n-values of 80-m-long tape were smaller than those of the short tape, although the PAIR process was applied. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：31 / 34
页数：4
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