Formation and texture of Bi-2223 phase during sintering in a temperature gradient

被引：8
作者：
Lu, XY [1 ]
Nagata, A
Watanabe, K
Nojima, T
Sugawara, K
Hanada, S
Kamada, S
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] Tohoku Univ, Ctr Low Temp Sci, Sendai, Miyagi 9808577, Japan
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2004年 / 412卷
关键词：
Bi-2223; superconductors; texture; temperature gradient; magnetic field sintering;
D O I：
10.1016/j.physc.2004.01.080
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The formation and texture of Bi-2223 phase during sintering in a temperature gradient were investigated. Co-precipitated powders with the composition of Bi:Pb:Sr:Ca:Cu = 1.85:0.35:1.90:2.05:3.05 were used. Samples set on a silver holder were sintered at 850 degreesC for 120 h in a vertical tube furnace with a temperature gradient of 15 degreesC/cm installed in a solenoid-type superconducting magnet. A vertical magnetic field can be applied parallel to the long axis of the furnace. It has been found that the Bi-2223 grains with their c-axis parallel to the axial direction of the vertical tube furnace are formed not only on the surface, but also in the center of the sample sintered at 850 degreesC for 120 It in 15 degreesC/cm temperature gradient without magnetic field. Moreover, the sample sintered in the temperature gradient and in a 10 T magnetic field have a stronger c-axis alignment of Bi-2223 phase. It is suggested that both the temperature gradient and magnetic field during sintering are favorable for the c-axis alignment of Bi-2223 phase. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：602 / 606
页数：5
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