ON THE COMPOSITION OF 110-K SUPERCONDUCTOR IN A (BI,PB)-SR-CA-CU-O SYSTEM

被引：21

作者：

BAI, VS ^{[1
]}

RAVI, S ^{[1
]}

RAJASEKHARAN, T ^{[1
]}

GOPALAN, R ^{[1
]}

机构：

[1] DEF MET RES LAB, HYDERABAD 500258, INDIA

来源：

JOURNAL OF APPLIED PHYSICS | 1991年 / 70卷 / 08期

关键词：

D O I：

10.1063/1.349119

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The 110 K superconductor of the (Bi,Pb)-Sr-Ca-Cu-O system is prepared in single-phase form at the composition Bi1.6Pb0.4Sr2.01Ca2.71Cu3.93Oy. Disks of the material with favorable texture can be obtained in relatively short durations in an O2 poor atmosphere. The literature on the compositions of the 110 K superconductor is reviewed to reveal that the material can be synthesized in single-phase form in a range of compositions, which is poorer simultaneously in Bi and Sr with respect to the nominal composition (Bi,Pb)2Sr2Ca2Cu3Oy, (2:2:2:3). At compositions close to 2:2:2:3, intermediate cold pressing steps between heat treatments are necessary to promote the formation of single-phase material. We find that at compositions which are considerably poorer in Bi and Sr with respect to 2:2:2:3, no such steps are necessary. In this paper, the microstructural reasons for this difference in behavior are also investigated.

引用

页码：4378 / 4382

页数：5

共 11 条

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