X-ray intensifying screen including a titanium activated hafnium dioxide phosphur containing holmium to reduce afterglow
US4972516A · kind A · utility
16Cited by
13References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 16, 1989 |
| Grant date | Nov 20, 1990 |
| Priority date | — |
| Expiry date | Nov 16, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/80
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An intensifying screen is disclosed containing a phosphor composition comprised of monoclinic crystals of a titanium activated hafnia phosphor host containing holmium ions to reduce afterglow. A phosphor composition in which zirconia is at least partially substituted for hafnia is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.