SIZE EFFECTS ON THE SUPERCONDUCTING PROPERTIES OF POLYCRYSTALLINE AGGREGATES OF BA2YCU3O7-DELTA CUPRATES

被引：6

作者：

BRUCE, AJ

EIBSCHUTZ, M

GRODKIEWICZ, WH

KYLE, TR

VANUITERT, LG

ZYDZIK, GJ

机构：

[1] AT&T Bell Lab, Murray Hill, NJ,, USA, AT&T Bell Lab, Murray Hill, NJ, USA

来源：

MATERIALS RESEARCH BULLETIN | 1988年 / 23卷 / 03期

关键词：

CERAMIC MATERIALS - Sintering - MAGNETIC MEASUREMENTS;

D O I：

10.1016/0025-5408(88)90008-6

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Ac magnetic susceptibility measurements have been performed on polycrystalline aggregates of Ba//2YCu//3O//7// minus // delta superconducting cuprates ranging in size from 40 mu m diameter granules to 3 multiplied by 3 multiplied by 5 mm bulk pieces. The susceptibility transition near 90K broadens and becomes progressively shallower for the smaller size aggregates. This phenomenon has been used to follow the consolidation of small aggregates during sintering between 450-950 degree C in an oxygen atmosphere. Significant consolidation occurs at and above 850 degree C, allowing the possibility of sintering at somewhat lower temperatures than previously anticipated. The influence of atmospheric moisture appears to be minimal.

引用

页码：349 / 355

页数：7

共 10 条

[1] CRITICAL-CURRENT MEASUREMENTS IN EPITAXIAL-FILMS OF YBA2CU3O7-X COMPOUND [J].