HIGH TEMPERATURE OXIDE SUPERCONDUCTOR

PURPOSE:To prevent the spontaneous disintegration phenomenon of a barium- contg. high temp. oxide superconductor due to moisture in the air by adding a metal oxide having water resistance by a reaction with barium to the superconductor. CONSTITUTION:Basic starting materials for a barium-contg. high...

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Hauptverfasser:	AKIBA YUKIO, IIDA MASAMORI, RI SHIYOUKEN, HIROSE YOICHI, KUROSU TATEO
Format:	Patent
Sprache:	eng
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:	PURPOSE:To prevent the spontaneous disintegration phenomenon of a barium- contg. high temp. oxide superconductor due to moisture in the air by adding a metal oxide having water resistance by a reaction with barium to the superconductor. CONSTITUTION:Basic starting materials for a barium-contg. high temp. oxide superconductor are mixed in a prescribed ratio, kneaded and temporarily sintered, partially generated green impurities are removed and the remainder is ground to obtain temporarily sintered powder. A metal oxide selected from oxides of cerium group elements each having water resistance by a reaction with barium is added to the poxyder by a prescribed amt. (3-10wt.% in the case of CeO2) and they are press-compacted into a pellet shape and heated in a furnace to obtain a sintered compact. This sintered compact is heated again in the air, slowly cooled, heat-treated and cooled to room temp. to produce the objective high temp. oxide superconductor preventing spontaneous disintegration and the deterioration of its superconducting characteristics.