Beads of polycrystalline alkali-metal or alkaline-earth metal fluoride, their preparation, and their use for preparing optical single crystals
US6451106B1 · kind B1 · utility
10Cited by
9References
21Claims
0Family size
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Key dates
| Filing date | Oct 4, 2000 |
| Grant date | Sep 17, 2002 |
| Priority date | — |
| Expiry date | Oct 21, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC30B29/12
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A polycrystalline alkali-metal or alkaline-earth metal (more particularly CaF2) fluorides, produced in an original form, namely in the form of beads; said beads having a diameter or equivalent diameter greater than or equal to 100 um, advantageously between 100 um and 2 cm and an apparent density greater than or equal to 60%, advantageously at least 90% of the theoretical density of said fluoride. A process for the preparation of single crystals of the corresponding alkali-metal or alkaline-earth metal fluorides that uses polycrystalline fluorides in the aforementioned original form.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.