Process for producing a superconductive complex metal oxide
US4988671A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 15, 1989 |
| Grant date | Jan 29, 1991 |
| Priority date | — |
| Expiry date | May 15, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S505/78
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.