Critical Current Properties of c-Axis Oriented Bi(Pb)2223 Bulks Sintered under High Gas Pressures

被引：3
|
作者：
Obata, K. [1 ]
Shimoyama, J. [1 ]
Yamamoto, A. [1 ]
Ogino, H. [1 ]
Kishio, K. [1 ]
Kobayashi, S. [2 ]
Hayashi, K. [2 ]
机构：
[1] Univ Tokyo, Dept Appl Chem, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1138656, Japan
[2] Sumitomo Elect Ind Ltd, Konohana ku, Osaka 5540022, Japan
来源：
SUPERCONDUCTIVITY CENTENNIAL CONFERENCE 2011 | 2012年 / 36卷
关键词：
high tempepature superconductor; Bi2223; bulk; high J(c); over pressure sintering; magnetic grain alignment technique;
D O I：
10.1016/j.phpro.2012.06.264
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
Enhancement of J(c) performance of Bi(Pb)2223 bulks was attempted by sintering under controlled over pressures (CT-OP) and c-axis grain orientation. Relative density of bulks increased up to 93% with an increase of total gas pressure during the sintering. In addition, improvement of grain coupling by CT-OP sintering was indicated from normal state resistivity. Reflecting these facts, the bulks sintered by the CT-OP method showed higher J(c) than the bulks sintered under ambient pressure. On the other hand, magnetic grain alignment technique was adopted to achieve c-axis grain orientation. The c-axis oriented bulks showed higher J(c) than randomly oriented bulks. The observed J(c) of 2.3 x 10(4) Acm(-2) (20 K, 1 kOe) was very high value as for Bi(Pb) 2223 sintered bulks. (C) 2012 Published by Elsevier B. V. Selection and/or peer-review under responsibility of the Guest Editors.
引用
收藏
页码：665 / 668
页数：4
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