Crystallites of cerium/lanthanum/terbium phosphates from insoluble rare earth salts
US5580490A · kind A · utility
2Cited by
7References
20Claims
0Family size
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Key dates
| Filing date | Sep 12, 1994 |
| Grant date | Dec 3, 1996 |
| Priority date | — |
| Expiry date | Sep 12, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K11/7777
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Needle-shaped solid crystallites of specific LaCeTb phosphates, well suited for the production of green phosphors therefrom, are essentially pure white in color after calcination at 900.degree. C. and have the formula (I): EQU La.sub.x Ce.sub.y Tb.sub.(1-x-y) PO.sub.4 (I) in which x and y are numbers, with x ranging from 0.4 to 0.6 and x+y being greater than 0.8.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.