Production of crystallites of cerium/lanthanum/terbium phosphates from insoluble rare earth salts
US5314641A · kind A · utility
9Cited by
3References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 20, 1992 |
| Grant date | May 24, 1994 |
| Priority date | — |
| Expiry date | Jul 20, 2012 |
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.