Method of making terbium activated yttrium aluminate phosphor
US4762639A · kind A · utility
8Cited by
1References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 23, 1987 |
| Grant date | Aug 9, 1988 |
| Priority date | — |
| Expiry date | Jul 23, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K11/7774
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A Y.sub.3 Al.sub.5 O.sub.12 :Tb and method for producing the phosphor are disclosed. The method invloves forming a uniform mixture of source materials for Y.sub.3 Al.sub.5 O.sub.12 :Tb phosphor and barium fluoride with the barium fluoride being present in the mixture at a level of from about 0.254 to about 7.61 weight percent, and firing the mixture at an elevated temperature to react the source material to form the phosphor. The phosphor has an improved brightness of at least about 75% over a phosphor of the same type produced without the barium fluorides.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.