Method for producing mixed metal oxides and metal oxide compounds
AssigneeAltair Nanomaterials Inc.
InventorsBruce Sabacky, Timothy Spitler, Jan Prochazka
Life of this patent
Estimating the term…
Abstract
A process to produce mixed metal oxides and metal oxide compounds. The process includes evaporating a feed solution that contains at least two metal salts to form an intermediate. The evaporation is conducted at a temperature above the boiling point of the feed solution but below the temperature where there is significant crystal growth or below the calcination temperature of the intermediate. The intermediate is calcined, optionally in the presence of an oxidizing agent, to form the desired oxides. The calcined material can be milled and dispersed to yield individual particles of controllable size and narrow size distribution.
Claims33
A method of making mixed metal oxides or metal oxide compounds using a feed solution comprising:
- a. selecting a first metal salt that hydrolyzes at the evaporation temperature of the feed solution;
- b. selecting a second metal salt that is stable at the evaporation temperature;
- c. preparing the aqueous feed solution comprising at least the first and second metal salts;
- d. evaporating the feed solution to form an intermediate in a controlled temperature substantially total evaporation process at a temperature higher than the boiling point of the feed solution but lower than the calcination temperature of the intermediate;
- and
- e. calcining the intermediate to produce mixed metal oxides or metal oxide compounds.
A method of making mixed metal oxides or metal oxide compounds using a feed solution comprising:
- a. preparing the aqueous feed solution of at least two metal salts;
- b. evaporating the feed solution to form an intermediate in a controlled temperature substantially total evaporation process at a temperature higher than the boiling point of the feed solution but lower than the calcination temperature of the intermediate;
- and
- c. calcining the intermediate to produce mixed metal oxides or metal oxide compounds wherein one metal is present mostly as one of the metal salts.
Dependencies are inferred from the claim text.