Method of making red-emitting borate phosphor
US7846354B2 · kind B2 · utility
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Key dates
| Filing date | Feb 13, 2008 |
| Grant date | Dec 7, 2010 |
| Priority date | — |
| Expiry date | Aug 27, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K11/774
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
There is described a method of producing a red-emitting manganese and cerium co-activated gadolinium magnesium zinc pentaborate phosphor that comprises combining a hydrated hexaborate of zinc, magnesium, and manganese with oxides of Gd and Ce to form a mixture, and firing the mixture in a slightly reducing atmosphere to form the phosphor. Preferably, the hydrated hexaborate has an approximate composition represented by (Zn,Mg,Mn)B6O10.XH2O, where X is 5.3 to 6.2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.