Ultrafine mixed-crystal oxide, production process and use thereof
AssigneeShowda Denko K.K.
InventorsJun Tanaka, Shinichiro Tomikawa
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Abstract
An ultrafine mixed-crystal oxide, wherein the oxide has a change in absorbance of about 5 (/hr) or less when measured in such a manner that said oxide is dispersed at a concentration of 0.067% in a solvent of a 98% glycerin in which Sunset Yellow is dissolved at a concentration of 0.02%, thereby preparing a dispersion, and the dispersion is irradiated with a BLB lamp (ultraviolet light) with an intensity of 1.65 mW/cm2 to obtain said change in absorbance (ΔOD) at 490 nm.
Claims16
An ultrafine mixed-crystal oxide has a BET specific surface area of about 10 to about 200 m2/g, and, wherein said oxide has a change in absorbance of about 5 (/hr) or less when measured in such a manner that said oxide is dispersed at a concentration of 0.067% in a solvent of a 98% glycerin in which Sunset Yellow is dissolved at a concentration of 0.02%, thereby preparing a dispersion, and said dispersion is irradiated with a BLB lamp (ultraviolet light) with an intensity of 1.65 mW/cm2 to obtain said change in absorbance (ΔOD) at 490 nm,
- and wherein said oxide comprises primary particles in a mixed crystal state with a bond selected from the group consisting of a titanium-oxygen-silicon bond, a titanium-oxygen-aluminum bond, and an aluminum-oxygen-silicon bond.
Dependencies are inferred from the claim text.