EFFECTS OF Y2BACUO5 ON THE DIRECTIONAL GROWTH OF YBA2CU3OX SUPERCONDUCTOR

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The effects Of Y2BaCUO5 on the microstructure and superconducting properties of YBa2CU3Ox samples, textured using the directional growth of Y2BaCuO5, BaCUO2 and CuO powder mixtures, were studied. Y2BaCuO5 moved downward as the sample passed up through the hot zone, and this downward movement affected the superconducting properties of the directionally grown samples. The critical temperature increased, and the resistance transition width decreased as the excess 211 content in the powder mixture increased up to a value, beyond which the temperature decreased and the width increased. The critical current densities of the directionally grown samples were scattered because of the presence of uncontrollable severe cracks perpendicular to the growth direction. As the hot-zone temperature increased, the critical current density of the directionally grown sample increased up to a maximum value ( > 6000 A CM-2 ) beyond which the critical current density decreased. Compared to data from other studies, the hot-zone temperature required to produce a maximum critical current density was lower.
Publisher
CHAPMAN HALL LTD
Issue Date
1994-05
Language
English
Article Type
Article
Citation

JOURNAL OF MATERIALS SCIENCE, v.29, no.9, pp.2345 - 2349

ISSN
0022-2461
DOI
10.1007/BF00363425
URI
http://hdl.handle.net/10203/67551
Appears in Collection
MS-Journal Papers(저널논문)
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