Method for producing fine particles of metal oxide
AssigneeShowa Denko K.K.
InventorsRyuji Monden, Kasumi Nakamura, Chozo Inoue, Masahiro Ohmori, Jun Tanaka, Tamotsu Yamashita, Mayumi Miyazawa
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Abstract
A method for producing fine particles of metal oxide characterized in that metal halide is hydrolyzed in the presence of organic solvent. According to this invention, under hydrolysis of titanium tetrachrolide, anatase type titanium oxide can be obtained by selecting hydrophilic organic solvent, and rutile type titanium oxide can be obtained by selecting hydrophobic organic solvent.
Claims7
A method for producing fine particles of metal oxide, comprising hydrolyzing metal halide in the presence of organic solvent to obtain the fine particles of metal oxide, wherein the amount of said organic solvent is from about 200 to about 10,000 parts by volume per 100 parts by volume of water and the amount of said water is from about 1 to about 100 times a theotetical volume of metal halide, and the mean particle size of said fine particle of metal oxide is about 20 nm or smaller.
A method for producing fine particles of metal oxide, comprising mixing water and organic solvent to form a mixture;
- adding metal halide to the mixture;
- and then hydrolyzing the metal halide, wherein the amount of said organic solvent is from about 200 to about 10,000 parts by volume per 100 parts by volume of water and the amount of said water is from about 1 to about 100 times a theoretical volume of metal halide, and further wherein the mean particle size of said fine particles of metal oxide is about 20 nm or smaller.
Dependencies are inferred from the claim text.