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

页码：31 / 34

页数：4

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