Effect of Pre-treatment on the Bi-2223/Ag Tapes Fabricated with Different Powders

被引：0
|
作者：
Li Mingya [1 ]
Chen Xingpin [2 ]
Ye Chengli
Yu Liang
Zhu Xu
机构：
[1] NE Univ Qinhuangdao, Dept Mat Sci & Engn, Qinhuangdao 066004, Peoples R China
[2] Chongqing Univ, Chongqing 400044, Peoples R China
来源：
RARE METAL MATERIALS AND ENGINEERING | 2011年 / 40卷
关键词：
pre-treatment; Bi-2223/Ag tapes; lead oxide compounds; critical current; CRITICAL-CURRENT DENSITY; PHASE-FORMATION; MICROSTRUCTURE;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Samples of Bi-2223/Ag tapes fabricated with powders contained different lead oxide compounds were annealed at a temperature lower than the formation temperature of Bi-2223 phase before traditional heat treatment, which was called pretreatment. In pre-treatment stage, samples were heat treated at 780 degrees C in 8.5% O-2, and the dwelling time is different. Experimental results show that pre-treatment had different influence on the formation and size of the Bi-2223 grains for tapes fabricated with powders contained different lead oxide compounds. For tapes contained both Ca2PbO4 and the 3321 phase, the decomposition of the 3321 phase enhanced the growth of Bi-2212 grains during pre-treatment process, which promoted the formation of Bi-2223 phase and enhanced the superconducting properties of Bi-2223/Ag tapes.
引用
收藏
页码：325 / 328
页数：4
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