Superconductor technology: apparatus – material – process – High temperature – per se – Having tc greater than or equal to 150 k
Patent
1988-06-03
1991-03-26
Dixon, Jr., William R.
Superconductor technology: apparatus, material, process
High temperature , per se
Having tc greater than or equal to 150 k
505738, 505783, H01L 3912
Patent
active
050029266
ABSTRACT:
Improved process for making Tl-Ca-Ba-Cu oxide superconductors. A solution of the nitrated of Ca, Ba, and Cu is reacted with a quaternary ammonium carbonate in a slurry (heel) of Tl.sub.2 O.sub.3. Carbonates of Ca, Ba, and Cu precipitate homogeneously on the Tl.sub.2 O.sub.3 particles. Solids are recovered, dried, and heated to make a superconductor. The method minimizes introdution of contaminants. Novel compositions result.
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Dolhert Leonard E.
Spencer Nicholas D.
Cabic Edward J.
Dixon Jr. William R.
Gallo Chris
McDowell, Jr William W.
W. R. Grace & Co. - Conn.
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