Yttrium—aluminum—garnet-type phosphor
US8771548B2 · kind B2 · utility
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4Claims
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Key dates
| Filing date | Mar 15, 2013 |
| Grant date | Jul 8, 2014 |
| Priority date | — |
| Expiry date | Mar 15, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K11/7776
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
It is an object to provide phosphors with high luminance. It also is an object to provide phosphors with less decrease in luminance due to a reduction in particle diameter. A first phosphor is represented by a general formula: aYO3/2.(3−a)CeO3/2.bAlO3/2.cGaO32.fWO3(2.80≦a≦2.99, 3.00≦b≦5.00, 0≦c≦2.00, 0.003≦f≦0.020, where 4.00≦b+c≦5.00). A second phosphor is represented by a general formula: aYO3/2.(3−a)CeO3/2.bAlO3/2.cGaO3/2.gK2WO4(2.80≦a≦2.99, 3.00≦b≦5.00, 0≦c≦2.00, 0.003≦g≦0.015, where 4.00≦b+c≦5.00).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.