Composition containing a core-shell aluminate, phosphor obtained from said composition, and preparation methods
US9290693B2 · kind B2 · utility
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Key dates
| Filing date | Nov 10, 2011 |
| Grant date | Mar 22, 2016 |
| Priority date | — |
| Expiry date | Mar 3, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K11/02
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A composition comprising an inorganic core and an aluminate shell is described. The aluminate can have the formula (1):(CeaTbb)Mg1+xAl11+yO19+x+y (1),where a, b, x and y comply with the relations a+b=1−0.2≦x≦+0.2 and −0.2≦y≦+0.2, wherein the shell uniformly covers the inorganic core over a thickness of no less than 300 nm. A phosphor is also described that can be obtained by calcinating the composition at a temperature of at least 1200° C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.