Luminescent hafnia composition
US4295989A · kind A · utility
19Cited by
4References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 23, 1980 |
| Grant date | Oct 20, 1981 |
| Priority date | — |
| Expiry date | Jun 23, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K11/7769
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A cubia, yttria stabilized halnia phosphor, doped with Ce.sup.3+, has been iscovered. The phosphor has a blue luminescence, peaking at about 4200 A, with a secondary peak in the 3800-4000 A region. The optimum composition is 3hfO.sub.2 :Y.sub.2 O.sub.3 :Ce.sup.3+ where the Ce.sup.3+ dopant ranges from 0.1-1.0 weight %.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.