Making Method for Titania Nanoparticle
First Claim
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1. A method of manufacturing titania nanoparticles, comprising:
- (1) a stage wherein a salt or alkoxide of titania is mixed with a solvent and scanned with microwaves to synthesize a titania precursor;
(2) a stage wherein an alkaline catalyst is added to the solvent containing titania precursor obtained in stage (1) above, so as to produce spherical nanoparticles of titanium hydroxide;
(3) a stage wherein crystalline spherical titania particles are made through stages of drying and sintering the titanium hydroxide obtained in step (2) above; and
(4) a stage wherein the nanoparticles obtained in step (3) above are hydrophobized.
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Abstract
The present invention relates to a method of manufacturing titania nanoparticles, and specifically to a method of manufacturing titania nanoparticles wherein the particle size is uniform, it is possible to manufacture monodisperse particles without aggregation among particles, a uniform coating can be applied, that is suitable to large-scale production, and that can obtain high-resolution images by maintaining the toner electric charge and electric charge distribution; and the developer included in said titania nanoparticles.
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Citations
18 Claims
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1. A method of manufacturing titania nanoparticles, comprising:
- (1) a stage wherein a salt or alkoxide of titania is mixed with a solvent and scanned with microwaves to synthesize a titania precursor;
(2) a stage wherein an alkaline catalyst is added to the solvent containing titania precursor obtained in stage (1) above, so as to produce spherical nanoparticles of titanium hydroxide;
(3) a stage wherein crystalline spherical titania particles are made through stages of drying and sintering the titanium hydroxide obtained in step (2) above; and
(4) a stage wherein the nanoparticles obtained in step (3) above are hydrophobized. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- (1) a stage wherein a salt or alkoxide of titania is mixed with a solvent and scanned with microwaves to synthesize a titania precursor;
- 9. Monodisperse spherical titania nanoparticles, wherein an average diameter of said titania nanoparticles is between 30 and 200 nm, a specific surface area is between 20 and 100 m2/g.
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10. (canceled)
- 13. A developer comprising monodisperse spherical titania nanoparticles and toner particles.
Specification