Back to results
US 6,559,103 B1Granted
Method for producing superconducting oxide compounds
AssigneeThe Boeing Company
InventorsBrad Lee Kirkwood, Thomas S. Luhman, Ronald Roy Stephenson, Michael Strasik
Life of this patent
Estimating the term…
Abstract
A process is provided for preparing solid superconducting mixed-metal oxides whereby the superconductor can be formed into any predetermined shape by way of viscous sol precursors. The superconductors are also formed by this process into homogeneous phases.
Claims19
A method for preparing a solid superconducting mixed-metal oxide in a predetermined shape and form, comprising the steps of:
- (a) providing a solution of salts of metals contained in said superconducting mixed metal oxide of a predetermined composition, each of said salts being present in an amount necessary to provide the respective predetermined stoichiometric amount of a metal required in said superconductive mixed metal oxide;
- the counterions of each metal ion, or the hydrolysis products of said counterions, in said solution of salts being removable from said solution by evaporative methods;
- (b) subjecting said solution to hydrolyzing conditions and removing said counterions and hydrolysis products thereof from said solution by evaporative methods with a substantial portion of the solvent;
- (c) converting said metal ions to a mixed-metal oxide precursor of said superconducting mixed-metal oxide;
- (d) peptizing said mixed-metal oxide precursor to form a viscous polymeric sol;
- (e) forming said viscous polymeric sol into a predetermined shape and form and heat-setting said sol into a flexible, ductile, handleable gel;
- (f) firing said gel in the presence of oxygen at a temperature and for a period of time sufficient to volatilize any remaining vapors and organic materials to form said solid superconducting mixed metal oxide.
4 more elements
A method of preparing a castable, extrudable, viscous polymeric sol to a superconducting mixed-metal oxide comprising the steps of:
- (a) providing a solution of salts of metals contained in said superconducting mixed metal oxide of a predetermined composition, each of said salts being present in an amount necessary to provide the predetermined stoichiometric amount of a metal required in said superconductive mixed metal oxide;
- the counterions of each metal ion, or the hydrolysis products of said counterions, in said solution of salts being removable from said solution by evaporative methods;
- (b) subjecting said solution to hydrolyzing conditions and removing said counterions and hydrolysis products thereof from said solution by evaporative methods with a substantial portion of the solvent;
- (c) converting said metal ions to a mixed-metal oxide precursor of said superconducting mixed-metal oxide;
- (d) peptizing said mixed-metal oxide precursor to form said viscous polymeric sol.
2 more elements
A method for preparing a solid superconducting mixed-metal oxide in a predetermined shape and form, comprising the steps of:
- (a) providing a solution of salts of metals contained in said superconducting mixed metal oxide of a predetermined composition, each of said salts being present in an amount necessary to provide the respective predetermined stoichiometric amount of a metal required in said superconductive mixed metal oxide;
- the counterions of each metal ion, or the hydrolysis products of said counterions, in said solution of salts being removable from said solution by evaporative methods;
- (b) subjecting said solution to hydrolyzing conditions and removing said counterions and hydrolysis products thereof from said solution by evaporative methods with a substantial portion of the solvent;
- (c) converting said metal ions to a mixed-metal oxide precursor of said superconducting mixed-metal oxide;
- (d) peptizing said mixed-metal oxide precursor to form a viscous polymeric sol;
- (e) forming said viscous polymeric sol into a predetermined shape and form and heat-setting said sol into a flexible, ductile, handleable gel;
- (f) firing said gel in the presence of oxygen at a temperature in the range of about 900-1100° C. and for a period of time sufficient to volatilize any remaining vapors and organic materials to form said solid superconducting mixed metal oxide.
4 more elements
Dependencies are inferred from the claim text.