Tin (IV) oxide nanopowder and methods for preparation and use thereof
AssigneeElectroplated Metal Solutions, Inc.
InventorsArkadiy A. Furman, Aleksander A. Andriiko, Sergiy M. Maliovanyi
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Abstract
A tin (IV) oxide nanopowder essentially free of byproducts and consisting of crystalline particles that have rutile crystalline structure is produced in bulk quantities by an inexpensive process of a chemical reaction of either a tin chloride of tin sulfate in an ionic melt of alkali metal nitrates followed by cooling, leaching with distilled water, and a thermal treatment. The nanopowder exhibits electrical conductivity substantially independent from its temperature in wide range of temperatures. Devices and coatings including the nanopowder are also disclosed.
Claims20
A tin oxide nanopowder consisting a plurality of tin (IV) oxide crystalline particles, each of said plurality of crystalline particles having rutile crystalline structure, wherein said nanopowder is essentially free of byproducts.
A method of preparation a tin oxide nanopowder consisting a plurality of tin (IV) oxide crystalline particles, each of said plurality of crystalline particles having rutile crystalline structure comprising the steps of:
- (a) providing a tin oxide precursor;
- (b) providing at least one nitrate of alkali metal;
- (c) creating a starting mixture of said tin oxide precursor and said at least one nitrate of alkali metal;
- (d) heating said starting mixture to a first temperature effective for conducting a chemical reaction of said tin oxide precursor and said at least one nitrate of alkali metal;
- (e) curing said starting mixture at said first temperature over a first period of time effective for completion of said chemical reaction;
- (f) cooling a resulting mixture to an ambient temperature;
- (g) leaching said resulting mixture with distilled water thereby creating a suspension;
- (h) separating said tin oxide nanopowder from said suspension;
- (i) heating said tin oxide nanopowder to a second temperature effective for removing residual moisture therefrom;
- and
- (j) curing said tin oxide nanopowder at said second temperature over a second period of time effective for removing said residual moisture.
Dependencies are inferred from the claim text.