PREPARATION OF RAW MATERIAL POWDER OF HIGH-TEMPERATURE SUPERCONDUCTING CERAMIC

PURPOSE:To increase density of high-temperature superconducting ceramic and critical current density by mixing precipitates obtained from respectively uniform solutions of element selected from rare earth element, etc., element selected from alkaline earth element, etc., and copper compound and prec...

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Bibliographic Details
Main Author IGAI SHIGERU
Format Patent
LanguageEnglish
Published 21.12.1989
Subjects
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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Summary:PURPOSE:To increase density of high-temperature superconducting ceramic and critical current density by mixing precipitates obtained from respectively uniform solutions of element selected from rare earth element, etc., element selected from alkaline earth element, etc., and copper compound and precipitant and calcining. CONSTITUTION:Respectively uniform solutions of a compound of M, a compound of A and copper compound exhibited in the formula M1AxCuyOz (M is rare earth element selected from Y, La, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb and Lu, Bi or Tl; A is alkaline earth element selected from Ca, Sr and Ba; x, y=1-4; z=3.5-9.5) are subjected to contact with a precipitant such as aqueous solution of caustic alkali or aqueous ammonia, etc., and respective precipitates are obtained. Then, mixed powder of said precipitates is calcined at 400-950 deg.C.
Bibliography:Application Number: JP19880254865