Microstructure and superconducting properties of Bi-2223/Ag tapes fabricated in the pressing-melting-sintering process

被引：3
作者：
Lu, X. Y. [1 ]
Yi, D. [2 ]
Chen, H. [3 ]
Nagata, A.
Sugawara, K.
机构：
[1] Akita Univ, Fac Engn & Resource Sci, Dept Mat Sci & Engn, Akita 0108502, Japan
[2] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China
[3] Changchun Univ Technol, Sch Mat, Changchun 130012, Peoples R China
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2010年 / 470卷 / 20期
关键词：
Bi-2223; Superconductors; Tape; Texture; Critical current density; Pressing-melting-sintering process; WIRES; PHASE;
D O I：
10.1016/j.physc.2010.05.120
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 pressing-melting-sintering process were investigated. Both the partial-melting and compressing have significant influence on the microstructure and the critical current density J(c). A high proportion and a low c-axis alignment of Bi-2223 phase exist in the tape with no-melting and no-compressing. The partial-melting process before sintering improves obviously the c-axis alignment, lowers a slight proportion of Bi-2223 phase. The compressing process during melting and sintering enhances the density of the HTS oxide core and heals the cracks. The tape sintered at 835 degrees C after partial-melting at 845 degrees C under compressing, which has fine second phases, strong c-axis grain alignment, very few cracks and dense the HTS oxide core, exhibits the highest J(c) value. These results indicated that both partial-melting process and compressing process are of real importance to the improvement of J(c) in Bi-2223 tapes. (c) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：1388 / 1391
页数：4
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