Method of removing impurities from a SrB4O7:Eu phosphor
US7232531B2 · kind B2 · utility
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3References
8Claims
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Key dates
| Filing date | Mar 17, 2005 |
| Grant date | Jun 19, 2007 |
| Priority date | — |
| Expiry date | Feb 23, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K11/774
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An acidic solution can be used to dissolve undesirable impurity phases in UV-emitting SrB4O7:Eu phosphors that reduce the UV emission intensity of said phosphor. In particular, the impurity phase, SrB6O10:Eu, is no longer detected after treating the phosphor with an acid washing process. The phosphors after acid washing are shown to have improved UV emission intensity without greatly increasing the mean particle size.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.