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US 8,298,506 B2Granted
Titanium dioxide particles doped with rare earth element
AssigneeNational Institute for Materials Science
InventorsJiguang Li, Takamasa Ishigaki
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Abstract
Titanium dioxide particles is doped with a rare earth element. The doping ratio of the rare earth element is within a range more than 0 at % and not more than 5.0 at %, and the rare earth element is substituted for titanium atoms in the unit lattice of titanium dioxide so that the titanium dioxide particles emit light attributable to the rare earth element when the titanium dioxide particles are irradiated with light having the absorption wavelength of titanium dioxide and showing a peak at 360 nm.
Claims6
Titanium dioxide particles doped with a rare earth element, wherein
- a doping ratio of said rare earth element is within a range more than 0 at% and not more than 5.0 at%,
- said rare earth element is substituted for titanium atoms in a unit lattice of titanium dioxide so that said titanium dioxide particles emit light attributable to said rare earth element when said titanium dioxide particles are irradiated with light having an absorption wavelength of titanium dioxide and showing a peak at 360 nm in an excitation spectrum, and
- a particle diameter of said titanium dioxide particles is within a range not less than 5 nm and not more than 100 nm.
Dependencies are inferred from the claim text.