MICROSTRUCTURAL AND SUPERCONDUCTIVE STUDIES OF AG-YBA2CU3O7-X COMPOSITES

被引：19

作者：

KHAN, HR

FRANCAVILLA, TL

HEIN, RA

PANDE, CS

QADRI, SB

SOULEN, RJ

WOLF, SA

机构：

[1] Materials Science and Technology Division, Naval Research Laboratory, Washington D.C.

[2] Forschungsinstitut f. Edelmetalle u. Metallchemie, Schwaebisch Gmuend

[3] Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee

来源：

JOURNAL OF SUPERCONDUCTIVITY | 1990年 / 3卷 / 02期

关键词：

Ag-YBa[!sub]2[!/sub]Cu[!sub]3[!/sub]O[!sub]7-x[!/sub] composites; critical current; microstructure;

D O I：

10.1007/BF00624507

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Composites of Ag-YBa2Cu3O7-x were synthesized and carefully characterized for crystal structure and microstructure by X-ray diffraction, optical microscopy, SEM, TEM, and EDAX techniques in order to investigate the effect of Ag additions on the superconducting properties of 123 compounds. The a.c. susceptibility data show that Tc (onset) of 123+Ag composites vary between 90.2 and 91.8 K. The Jc values we measured for 123 material without silver were in the range of earlier reported values for the pure 123 material. Whereas there is a relatively small increase in the critical current for the YBCO/Ag2O ratio of 3, the variation of the grain size of the composites shows that these Jc changes are due to slight variations in the grain size rather than any dramatic effect of Ag inclusions as speculated earlier. © 1990 Plenum Publishing Corporation.

引用

页码：189 / 195

页数：7

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