Process for producing fluorescent material
US10759995B2 · kind B2 · utility
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Key dates
| Filing date | Feb 17, 2016 |
| Grant date | Sep 1, 2020 |
| Priority date | — |
| Expiry date | Feb 7, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2002/54
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to a process for producing a composite-fluoride fluorescent material represented by the general formula A2MF6:Mn4+ (wherein A is at least one alkali metal element including K; M is one or more metallic elements including at least Si or Ge and selected from among Si, Ge, Sn, Ti, Zr, and Hf; F is fluorine; and Mn is manganese). With the production process, it is possible to obtain a fluorescent material which is high in absorptance, internal quantum efficiency, and external quantum efficiency and has excellent optical properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.