Reduction of lag in yttrium tantalate x-ray phosphors
US5716546A · kind A · utility
4Cited by
7References
19Claims
0Family size
Assignee
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Key dates
| Filing date | Oct 23, 1996 |
| Grant date | Feb 10, 1998 |
| Priority date | — |
| Expiry date | Oct 23, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K11/7786
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Phosphor lag was reduced to acceptable levels in high lag monoclinic M' yttrium tantalate x-ray phosphors through the addition of minor amounts europium to the phosphors. In particular, europium was added to yttrium tantalate phosphors containing terbium and to phosphors formulated with a stoichiometric excess of yttrium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.