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Microstructure and Electrical Properties of (YNdSm)-Ba-Cu-O High Tc Composite Superconductors by Zone Melting Process
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 Title & Authors
Microstructure and Electrical Properties of (YNdSm)-Ba-Cu-O High Tc Composite Superconductors by Zone Melting Process
Kim, So-Jung; Lee, Sang-Heon;
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 Abstract
(YNdSm)-Ba-Cu-O system high Tc composite superconductors were directionally grown by zone melting process, having large temperature gradient, in air atmosphere. Cylindrical green rods of [(YNS)1.8]composite oxides by CIP (cold isostatic pressing) method using rubber mold were fabricated. The microstructure and superconducting properties were investigated by XRD, TEM and SQUID magnetometer. The size of nonsuperconducting inclusions of the melt-textured (YNS)1.8 sample with additive were remarkably reduced and uniformly distributed within the superconducting (YNS)1.8 matrix. (YNS)1.8 samples, with / without additive, showed an onset and sharp superconducting transition. The critical current density value of the (YNdSm)1.8 superconductor with additive were 840 A, in 77 K, 0 Tesla by direct current transport method.
 Keywords
(YNS)-B-C-O;Composites;CIP;;Zone melting process;
 Language
Korean
 Cited by
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