Method for preparing particles of metal oxide (tin oxide)
AssigneeEastman Kodak Company
InventorJean C. Robert
Life of this patent
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Abstract
A fine metal oxide powder is prepared by a method comprising the steps of (1) preparing a hydroxide precursor of a metal oxide, (2) mixing the precursor with an inorganic compound having a melting point lower than the crystallization temperature of the metal oxide, and (3) subjecting the resulting mixture to a high temperature thermal treatment to form the fine metal oxide powder.
Claims10
A method of preparing a fine tin oxide powder comprising the steps of:
- (1) precipitating tin hydroxide;
- (2) mixing said tin hydroxide with an inorganic compound having a melting point lower than the crystallization temperature of tin oxide to form a mixture;
- and
- (3) subjecting said mixture to a high temperature thermal treatment at a temperature of from 400.degree. C. to 1200.degree. C. to form said fine tin oxide powder.
A method of preparing a fine tin oxide powder that has electrically-conductive properties comprising the steps of:
- (1) co-precipitating tin hydroxide together with a doping agent to form a co-precipitate,
- (2) mixing said co-precipitate with an inorganic compound having a melting point lower than the crystallization temperature of tin oxide to form a mixture, and
- (3) subjecting said mixture to a high temperature thermal treatment at a temperature of from 400.degree. C. to 1200.degree. C. to form said electrically-conductive fine tin oxide powder.
A method of preparing a fine tin oxide powder that has electrically-conductive properties comprising the steps of:
- (1) co-precipitating tin hydroxide and antimony hydroxide to form a co-precipitate;
- (2) mixing said co-precipitate with an inorganic compound having a melting point lower than the crystallization temperature of tin oxide to form a mixture;
- and
- (3) subjecting said mixture to a high temperature thermal treatment at a temperature of from 600.degree. C. to 900.degree. C. to form said fine electrically-conductive tin oxide powder.
A method of preparing a fine tin oxide powder that has electrically-conductive properties comprising the steps of:
- (1) co-precipitating tin hydroxide and antimony hydroxide to form a co-precipitate;
- (2) mixing said co-precipitate with potassium chloride to form a mixture;
- and
- (3) subjecting said mixture to a high temperature thermal treatment at a temperature of from 600.degree. C. to 900.degree. C. to form said fine electrically-conductive tin oxide powder.
Dependencies are inferred from the claim text.