IMPROVED METHOD FOR PREPARING YBA2CU3O7-X SUPERCONDUCTOR

IMPROVED METHOD FOR PREPARING YBA2CU3O7-X SUPERCONDUCTOR

The improved method comprises (A) synthesizing liquid phase generated powder (3BaCuO2+2CuO) by mixing Ba and Cu in a ratio of 3:5, followed by calcining the mixture at 870 deg.C for 26 hours, (B) synthesizing Y2BaCuO5 powder by mixing Y, Ba and Cu in a ratio of 2:1:1, followed by calcinating the mix...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: JEE, YOUNG - AH, YUN, DUK - YONG, SEO, JUNG - HOON, KANG, SUK - JOONG
Format: Patent
Sprache:eng ; kor
Schlagworte:
ARTIFICIAL STONE
BASIC ELECTRIC ELEMENTS
CABLES
CEMENTS
CERAMICS
CHEMISTRY
COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS
COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F
CONCRETE
CONDUCTORS
ELECTRICITY
INORGANIC CHEMISTRY
INSULATORS
LIME, MAGNESIA
METALLURGY
REFRACTORIES
SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES
SLAG
TREATMENT OF NATURAL STONE
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Beschreibung
Zusammenfassung:The improved method comprises (A) synthesizing liquid phase generated powder (3BaCuO2+2CuO) by mixing Ba and Cu in a ratio of 3:5, followed by calcining the mixture at 870 deg.C for 26 hours, (B) synthesizing Y2BaCuO5 powder by mixing Y, Ba and Cu in a ratio of 2:1:1, followed by calcinating the mixture at 925 deg.C for 23 hours and sintering the cold pressure moulded Y2BaCuO5 powder at 1,050 deg.C for 15 hours, and (C) surrounding Y2BaCuO5 sintered body with the liquid-phase generated powder and thermal-treating at 800-1,000 deg.C for 15-50 hours under the oxygen atmosphere.