Terbium-activated gadolinium oxysulfide X-ray phosphor
US4507560A · kind A · utility
16Cited by
3References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 13, 1980 |
| Grant date | Mar 26, 1985 |
| Priority date | — |
| Expiry date | Jun 13, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K11/7771
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An improved (Gd.sub.1-x Tb.sub.x).sub.2 O.sub.2 S X-ray phosphor, wherein x is from 0.0003 to 0.0045, and persistence causing impurity ions are kept below 5 ppm, exhibits increased brightness in the blue region of the spectrum, while exhibiting acceptably low persistence for X-ray intensifying screen applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.