Synthesis of ceramic superconductor CPO from xenotyme

Details Synthesis of ceramic superconductor CPO from xenotyme Synthesis of ceramic superconductor CPO from xenotyme

1988-12-23

1991-06-04

Morry, Theodore

Superconductor technology: apparatus, material, process

High temperature , per se

Having tc greater than or equal to 150 k

423 211, 423 92, 423263, 423593, 423604, H01B 1200, C01F 1700

Patent

active

050213970

ABSTRACT:
A process for the preparation of a superconductor of the type AB.sub.2 Cu.sub.3 O.sub.7-x, wherein A is a mixture of rare earths, B is an alkaline earth metal and x is less than one, comprising the treatment of xenotime to obtain a rare earths oxide therefrom and mixing the oxide with an alkaline earth metal compound and a copper compound and heat treating the mixture to obtain the superconductor. The treatment of the xenotime comprising melting the xenotime with a 1:1 mixture of Na.sub.3 CO.sub.3 and K.sub.2 CO.sub.3, dissolving a solid obtained therefrom in HCl, treating the resulting solution with NH.sub.4 OH to precipitate the rare earths, dissolving the precipitate in HCl, treating the resulting solution with H.sub.2 C.sub.2 O.sub.4 to precipitate the rare earths aned calcinating the precipitate to obtain a rare earths oxide.

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