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US 4,988,671 AGranted
Process for producing a superconductive complex metal oxide
AssigneeHoechst Celanese Corporation
InventorRobert E. Johnson
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AssigneeHoechst Celanese Corporation
InventorRobert E. Johnson
Estimating the term…
Complex metal oxides are formed by calcining in molecular oxygen such as air at least one bimetallic complex of the formula A[BY] wherein A and B are metals and Y is a ligand associated with B. The bimetallic complexes are precipitated from aqueous solution by a transposition reaction of AX and M[BY] wherein X is a disassociable anion and M is a cationic species. The bimetallic complexes are useful in forming pure complex metal oxide fibers by a process of either dispersing the complex metal oxide or bimetallic precursors in a spinning composition of fluid organic polymer or by imbibing a polymeric fiber with species AX and precipitating out the bimetallic complex by treating the imbibed fiber with a compound containing the BY complex. The process is also useful in forming superconductive complex metal oxides. The use of the bimetallic complex as precursors for the complex metal oxides provide improved mixing of the metal elements on an atomic scale and thus require less severe mixing and annealing conditions to form the oxide.
A process for producing a superconductive complex metal oxide composition of the formula A.sub.2-x B.sub.x CO.sub.y wherein
A process for producing a superconductive complex metal oxide composition of the formula YBa.sub.2 Cu.sub.3 O.sub.7 ;
A process for producing a superconductive complex metal oxide composition of the formula A-B-C-O wherein
A process for producing a shaped superconductive complex metal oxide of the formula A-B-C-O, wherein A is a Group IIIB metal including the lanthanide series metals, B is a Group IIA metal and C is a metal selected from the Group consisting of V, Cr, Mh, Co, Ni, and Cu, said process comprising:
Dependencies are inferred from the claim text.