Material processing of Ca/Y substituted single (Bi,Pb) O-layered 1212

被引：12

作者：

Bauer, A ^{[1
]}

Zoller, P ^{[1
]}

Glaser, J ^{[1
]}

Ehmann, A ^{[1
]}

Wischert, W ^{[1
]}

KemmlerSack, S ^{[1
]}

机构：

[1] UNIV TUBINGEN,INST ANORGAN CHEM,D-72076 TUBINGEN,GERMANY

来源：

PHYSICA C | 1996年 / 256卷 / 1-2期

关键词：

D O I：

10.1016/0921-4534(95)00631-1

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The superconducting properties of bulk (Bi, Pb)-1212 material are strongly influenced by the chemical starting composition, the employed temperature/time schedule and gas atmosphere. It is shown that via the application of melt texturing (Bi, Pb)-1212 material with improved intragrain and intergrain properties is obtained. The best materials are formed for a Y/Ca ratio of 0.7/0.4 with Bi:Pb:Sr:Y:Ca:Cu = 0.4:0.45: 1.9:0.7:0.4:2.25 after application of 1030 degrees C as melting temperature and a cooling rate of 35 degrees C/ h to 985 degrees C/12 h. The transition temperature is situated at 94 K with a critical current density j(cm) = 7.4 x 10(5) Acm(-2) (5 K, 0 T) and 2.8 x 10(3) Acm(-2) (77 K, 0 T).

引用

页码：177 / 182

页数：6

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