BI,PB(2212) AND BI(2223) FORMATION IN THE BI-PB-SR-CA-CU-O SYSTEM

被引：69
|
作者：
JEREMIE, A
ALAMIYADRI, K
GRIVEL, JC
FLUKIGER, R
机构：
[1] Dept. de la Matiere Condensee, Geneva Univ.
来源：
SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 1993年 / 6卷 / 10期
关键词：
D O I：
10.1088/0953-2048/6/10/005
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
A new route has been found for producing the Bi2Sr2CaCu2Oy phase with Pb substituted for part of the Bi (denoted Bi,Pb(2212)). By this novel route, Bi,Pb(2212) has been prepared in air at 860-degrees-C. For comparison, this phase has also been prepared in argon at 740-degrees-C by the previously known route. Bi,Pb(2212) transforms from a tetragonal to an orthorhombic structure as the Pb content grows. Once this phase was obtained with a nominal composition of Bi2-xPbxSr2CaCu2Oy with Pb contents x = 0, 0.2, 0.4 and 0.6, the Bi(2223) phase was formed starting from Bi(2212) and Bi,Pb(2212). Single-phase samples were obtained after two heat treatments at 849-degrees-C with Bi,Pb(2212) and a proportion of Pb of x = 0.4. This proportion corresponds to the one used previously by the authors to obtain high critical current carrying tapes in Ag-clad Bi(2223) tapes.
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页码：730 / 735
页数：6
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