DEVELOPMENT OF MICROSTRUCTURE AND SUPERCONDUCTIVITY OF SILVER-CLAD BI(2223) COMPOSITE TAPES IN THE PROCESS OF HEAT-TREATMENT

被引：14

作者：

GUO, YC

LIU, HK

DOU, SX

机构：

[1] School of Materials Science and Engineering, The University of New South Wales, Kensington, NSW 2033

来源：

MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY | 1994年 / 23卷 / 01期

关键词：

D O I：

10.1016/0921-5107(94)90279-8

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A systematic study on the development of phase composition, microstructure and superconducting properties (critical temperature T-c and critical current density J(c)) in silver-clad (Bi,Pb)(2)Sr2Ca2Cu3O10 composite tapes during the process of heat treatment has been conducted using X-ray diffraction, scanning electron microscopy and electrical measurements. The correlation between the tape's high T-c phase purity, microstructure and superconducting properties at different heat treatment stages has been carefully analysed and explained. The results indicate that pure high T-c phase, high degree of grain alignment, high mass density and good connection between grains are all essential for superconducting tapes to carry a large current. With the optimized process parameters, a critical current density J(c) up to 32 665 A cm(-2) (corresponding critical current, 42.3 A) at 77 K and self-magnetic field for silver-clad (Bi,Pb)(2)Sr2Ca2Cu3O10 superconducting composite tapes has been achieved.

引用

页码：58 / 65

页数：8