Method of making tungsten-copper composite oxides
AssigneeOsram Sylvania Inc.
InventorsLeonid P. Dorfman, Michael J. Scheithauer, David L. Houck, Nelson E. Kopatz
Life of this patent
Estimating the term…
Abstract
A method for making a tungsten-copper composite oxide wherein an amount of an ammonium tungstate and an amount of an oxide or hydroxide of copper are combined without milling to form a mixture. The unmilled mixture is then dehydrated and fired at a temperature and for a time sufficient to form the tungsten-copper composite oxide.
Claims12
A method of making a tungsten-copper composite oxide, comprising the steps of blending an amount of an ammonium tungstate and an amount of an oxide or hydroxide of copper without milling to form an unmilled mixture, dehydrating the unmilled mixture, and then firing the unmilled mixture at a temperature and for a time sufficient to form the tungsten-copper composite oxide.
A method of making a tungsten-copper composite oxide, comprising the steps of:
- blending an amount of an ammonium tungstate and an amount of an oxide or hydroxide of copper without milling to form an unmilled mixture having a dehydration temperature;
- forming a bed of the unmilled mixture in a furnace having a temperature below the dehydration temperature of the unmilled mixture;
- increasing the temperature of the furnace to a temperature sufficient to form the tungsten-copper composite oxide, the temperature of the furnace being increased at a rate sufficient to dehydrate the unmilled mixture prior to the formation of the tungsten-copper composite;
- and
- firing the unmilled mixture at the temperature sufficient to form the tungsten-copper composite oxide and for a time sufficient to form the tungsten-copper composite oxide.
Dependencies are inferred from the claim text.