THE INFLUENCE OF INITIAL COMPOSITION AND OXYGEN PARTIAL-PRESSURE ON THE PROPERTIES OF MELT-TEXTURED NDBACUO

Authors
BIEGER W KRABBES G SCHATZLE P ZELENINA L WIESNER U VERGES P
Citation
W. Bieger et al., THE INFLUENCE OF INITIAL COMPOSITION AND OXYGEN PARTIAL-PRESSURE ON THE PROPERTIES OF MELT-TEXTURED NDBACUO, Physica. C, Superconductivity, 257(1-2), 1996, pp. 46-52
Citations number
9
Categorie Soggetti
Physics, Applied
Journal title
Physica. C, Superconductivity → ACNP
ISSN journal
09214534
Volume
257
Issue
1-2
Year of publication
1996
Pages
46 - 52
Database
ISI
SICI code
0921-4534(1996)257:1-2<46:TIOICA>2.0.ZU;2-G
Abstract
The influence of several admixtures on the microstructure formation an d the superconducting properties is explained on the base of phase-equ ilibrium considerations. Conditions are derived which permit the stabi lization of Ba rich Nd-123 phase to occur which is a precondition for preparing textured NdBaCuO materials with T-c> 90 K and a sufficient h igh j(c). A melt-textured bulk material with T-c = 91 K and j(c)(77 K, 0 T, B parallel to c) = 21.8 kA/cm(2) was produced at p(O-2) approxim ate to 100 Pa using an initial mixture consisting of NdBa2Cu3O7-delta and Nd2BaO4.