Flame made metal oxides
AssigneeEidgenossische Technische Hochschule Zurich
InventorsWendelin J. Stark, Lutz Mädler, Sotiris E. Pratsinis
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Abstract
Described is a method for the production of metal oxides by flame spray pyrolysis, in particular mixed metal oxides such as ceria/zirconia, and metal oxides obtainable by said method. Due to high enthalpy solvents with a high carboxylic acid content said metal oxides have improved properties. For example ceria/zirconia has excellent oxygen storage capacity at high zirconium levels up to more than 80% of whole metal content.
Claims33
A method for the production of a metal oxide, wherein at least one metal oxide precursor is dissolved in a high enthalpy carboxylic acid solvent comprising at least one carboxylic acid with a mean carbon content at least 2.2 carbon atoms in an amount of at least 60% of the whole solvent to form a solution, and wherein said solution is then formed into droplets and flame oxidized.
Dependencies are inferred from the claim text.