PROCESSING EFFECTS ON HIGH-TC PROPERTIES OF YBA2CU3O7-X FILMS FROM CARBOXYLATE SOLUTION PRECURSORS

被引：20

作者：

CHU, PY

CAMPION, I

BUCHANAN, RC

机构：

[1] Department of Materials Science and Engineering, University of Illinois at Urbana—Champaign, Urbana, Illinois

来源：

JOURNAL OF MATERIALS RESEARCH | 1993年 / 8卷 / 02期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1557/JMR.1993.0261

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Heat-treatment temperature/time and ambient effects on the properties of YBa2Cu3O7-x superconducting films derived from carboxylate precursors were investigated. The thin films were processed under O2, N2, or N2/O2 mixed atmosphere. The use of N2 or N2-rich atmosphere facilitated the 123 phase formation, grain growth, and orientation due to liquid phase assist sintering. Thin films with T(c(zero)) = 87.8 and J(c) > 10(5) A/cm2 at 77 K were prepared under such atmosphere at T less-than-or-equal-to 920-degrees-C. Higher temperatures were required for thin films processed under O2 atmosphere and inferior transport properties were obtained. Processing above the melting temperature resulted in highly oriented films with dense microstructures and large grains, but significant post annealing was needed to obtain good film properties.

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页码：261 / 267

页数：7

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