Superconductor technology: apparatus – material – process – High temperature – per se – Having tc greater than or equal to 150 k
Patent
1989-03-16
1991-03-19
Dixon, Jr., William R.
Superconductor technology: apparatus, material, process
High temperature , per se
Having tc greater than or equal to 150 k
505738, H01L 3912
Patent
active
050011090
ABSTRACT:
Improved process for making Bi-Pb-Sb-Sr-Ca-Cu oxide superconductors. A solution of the nitrates of Bi, Pb, Sr, Ca, and Cu is reacted with a quaternary ammonium carbonate in a dispersion (heel) of Sb.sub.2 O.sub.5. Carbonates of Bi, Pb, Sr, Ca, and Cu precipitate homogeneously on the Sb.sub.2 O.sub.5 particles. Solids are recovered, dried, and heated to make a superconductor. The method minimizes handling toxic antimony compounds and reduces introduction of contaminants. Novel compositions result.
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Two Declarations under 37 CFR 1.131 from file of Bunker U.S. Pat. No. 4,839,339.
Dixon Jr. William R.
Gallo Chris
McDowell, Jr. Wm. W.
W. R. Grace & Co.,-Conn.
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