SURFACE DEGRADATION OF YBA2CU3O7-DELTA SUPERCONDUCTORS ON EXPOSURE TO AIR AND HUMIDITY

被引：38

作者：

BUYUKLIMANLI, TH

SIMMONS, JH

机构：

来源：

PHYSICAL REVIEW B | 1991年 / 44卷 / 02期

关键词：

D O I：

10.1103/PhysRevB.44.727

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Surface modifications from exposure of YBa2Cu3O7-delta pellets and thin films of the 1:2:3 composition to ambient atmosphere and 85% relative humidity at 50-degrees-C were measured using x-ray photoelectron spectroscopy and scanning Auger electron multiprobe. Surface formation of BaCO3 and Ba(OH)2 was detected. The surface layer of the sintered pellets did not have any Cu after 48 h of moisture treatment. The degradation in the thin-film samples was substantially less. The rate of degradation appears to be controlled by grain-boundary diffusion.

引用

页码：727 / 733

页数：7

共 43 条

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