Effect of the variation-temperature-sintering on microstructure and superconducting properties of Bi-2223/Ag tapes in high magnetic fields

被引：4
作者：
Lu, X. Y. [1 ]
Watanabe, K. [2 ]
Yi, D. [3 ]
Chen, H. [4 ]
Nagata, A.
机构：
[1] Akita Univ, Fac Engn & Resource Sci, Dept Mat Sci & Engn, Akita 0108502, Japan
[2] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan
[3] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China
[4] Changchun Univ Technol, Sch Mat, Changchun 130012, Peoples R China
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2011年 / 471卷 / 21-22期
关键词：
Bi-2223; Superconductors; Texture; Magnetic field sintering; Critical current density; TEXTURE; PHASE; SOLIDIFICATION;
D O I：
10.1016/j.physc.2011.05.131
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The microstructure and superconducting properties of Bi-2223/Ag tapes fabricated in the variation-temperature-sintering process during high magnetic fields were investigated. The flat tapes 0.6 mm in thickness and 3 mm in width set on the an isolite holder were sintered in following conditions for 120 h in 10 T magnetic fields in air: (1) isothermal-temperature-sintering at 835 degrees C, (2) variation-temperature-sintering from 840 to 835 degrees C, (3) variation-temperature-sintering from 845 to 835 degrees C, (4) variation-temperature-sintering from 850 to 835 degrees C, (5) variation-temperature- sintering from 835 to 840 degrees C. The results show that the tapes variation-temperature-sintered from high temperature to low temperature show stronger c-axis alignment of the Bi-2223 phase and higher J(c) value than that isothermal-temperature-sintered and variation-temperature-sintered from low temperature to high temperature. However, the starting temperature (above 850 degrees C) of the variation-temperature-sintering from high temperature to low temperature is too high, the proportion of Bi-2223 phase decreases largely. The tape variation-temperature-sintered from 845 to 835 degrees C in a 10 T magnetic fields shows a strong c-axis alignment of the Bi-2223 phase, a high proportion of Bi-2223 phase, and the highest J(c) value. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：1090 / 1092
页数：3
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