Method of making metal oxide ceramic powders by using a combustible amino acid compound
AssigneeBattelle Memorial Institute
InventorsLarry R. Pederson, Lawrence A. Chick, Gregory J. Exarhos
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Abstract
This invention is directed to the formation of homogeneous, aqueous precursor mixtures of at least one substantially soluble metal salt and a substantially soluble, combustible co-reactant compound, typically an amino acid. This produces, upon evaporation, a substantially homogeneous intermediate material having a total solids level which would support combustion. The homogeneous intermediate material essentially comprises highly dispersed or solvated metal constituents and the co-reactant compound. The intermediate material is quite flammable. A metal oxide powder results on ignition of the intermediate product which combusts same to produce the product powder.
Claims21
A process for producing a metal oxide powder, which comprises
- forming a substantially homogeneous, aqueous precursor mixture comprising at least one substantially water soluble metal salt and a substantially water soluble combustible amino acid compound;
- evaporating said aqueous precursor mixture to form a substantially homogeneous intermediate material having a concentration which will support combustion;
- and
- heating said intermediate material to the point of autoignition thereby autoigniting and combusting said intermediate material to produce said metal oxide powder.
The process of forming a substantially homogeneous, precursor aqueous mixture for use in producing a metal oxide powder, consisting essentially of
- providing at least one substantially water soluble metal salt;
- combining said water-soluble metal salt with a substantially water soluble combustible amino acid to form said precursor aqueous mixture, said precursor aqueous mixture being heatable to the point of autoignition, and thereby being autoignited and combusted to produce said metal oxide powder;
- and
- igniting said intermediate material to form a metal oxide powder.
Dependencies are inferred from the claim text.