Suspensions of phosphates of at least one rare earth element selected from among cerium and terbium and optionally lanthanum and luminophores produced therefrom
US9982191B2 · kind B2 · utility
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16Claims
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Key dates
| Filing date | May 13, 2009 |
| Grant date | May 29, 2018 |
| Priority date | — |
| Expiry date | Dec 20, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/44
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Phosphate particulates of at least one rare-earth metal (Ln), with Ln being at least one rare-earth metal selected from among cerium and terbium and optionally lanthanum are in the form of a suspension in a liquid phase of primary isotropic monocrystalline monazite particles having an average size of at least 25 nm and agglomerated into secondary particles having an average size of at most 400 nm; useful luminophores are produced from such phosphate particulates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.