Method for producing transition metal oxide fine particles
AssigneeLG Electronics Inc.
InventorsSeojin LEE, Yooseok KWON, Sanghyun HONG
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Abstract
Disclosed is a method for producing transition metal oxide fine particles having a size smaller than several micrometers (μm), and more preferably, having a size of several hundred nanometers (nm). To this end, the method for producing transition metal oxide fine particles of the present invention comprises dissolving a transition metal oxide in a strongly basic aqueous solution, and titrating same with a strongly acidic aqueous solution, thereby precipitating transition metal oxide fine particles.
Claims20
A method of producing transition metal oxide fine particles comprising:
- heating and agitating a strong base aqueous solution;
- adding and dissolving a transition metal oxide into the heated strong base aqueous solution;
- forming a mixed aqueous solution by a strong acid aqueous solution to the strong base aqueous solution in which the transition metal oxide is dissolved, and by agitating and dissolving solids at an interface between the strong base aqueous solution and the strong acid aqueous solution;
- controlling a speed or an amount of the strong aqueous solution to be added to the strong base aqueous solution, to adjust pH of the mixed aqueous solution and to precipitate transition metal oxide fine particles;
- and
- separating the transition metal oxide fine particles from the mixed aqueous solution, and washing, drying and heat-treating the separated transition metal oxide fine particles.
A method of producing transition metal oxide fine particles comprising:
- providing a strong base aqueous solution by heating and agitating after adding a sodium hydroxide and a surfactant to water;
- adding a transition metal oxide to the heated strong base aqueous solution, and dissolving the transition metal oxide into the strong base aqueous solution;
- forming a mixed aqueous solution by adding a strong acid aqueous solution to the strong base aqueous solution in which the transition metal oxide is dissolved, and by agitating and dissolving solids at an interface between the strong base aqueous solution and the strong acid aqueous solution;
- controlling a speed or an amount of the strong aqueous solution to be added to the strong base aqueous solution, to adjust pH of the mixed aqueous solution and to precipitate transition metal oxide fine particles;
- and
- separating the transition metal oxide fine particles from the mixed aqueous solution, and washing, drying and heat-treating the separated transition metal oxide fine particles.
Dependencies are inferred from the claim text.