JP2966134B

JP2966134B

PURPOSE:To produce a Bi-based oxide superconductor free from a coarse foreign phase and excellent in superconductivity such as Jc. CONSTITUTION:The raw material A consisting essentially of a Bi2Sr2Ca2Cu3Ox phase ((2223) phase) and the raw material B consisting essentially of a Bi2Sr2 Ca1Cu2Ox phase...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: KIKUCHI SUKEYUKI, NEMOTO KYOSHI, MIMURA MASANAO
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 produce a Bi-based oxide superconductor free from a coarse foreign phase and excellent in superconductivity such as Jc. CONSTITUTION:The raw material A consisting essentially of a Bi2Sr2Ca2Cu3Ox phase ((2223) phase) and the raw material B consisting essentially of a Bi2Sr2 Ca1Cu2Ox phase ((2212) phase) are mixed so that the mixture contains 5-95wt.% of the (2223) phase. The mixture is formed into a desired shape, and the formed body is heat-treated under specified conditions. Since the (2223) phase as the reaction nucleus toward a superconductor is uniformly distributed in the mixture, the (2223) phase is converted to an oxide superconductor in a short time. As a result, the formed body is sintered at a low temp. since the (2212) phase, etc., are contained, the foreign phase is not coarsened, and the Jc is enhanced.