Rare-earth-doped yttria-gadolina ceramic scintillators
US4747973A · kind A · utility
37Cited by
7References
24Claims
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Assignee
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Key dates
| Filing date | Jul 11, 1986 |
| Grant date | May 31, 1988 |
| Priority date | — |
| Expiry date | Jul 11, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K11/7787
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Rare-earth-doped, polycrystalline yttria-gadolinia ceramic scintillators with high density, optical clarity, uniformity, cubic structure and which are useful in the detection of x-rays, include one or more of the oxides of rare earth elements Eu, Nd, Yb, Dy, Tb, and Pr as activators. The ceramic scintillator may also include CaO, SrO, and Yb.sub.2 O.sub.3 as afterglow reducers. Sintering, sintering combined with gas hot isostatic pressing, and hot pressing methods for preparing the ceramic scintillators are also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.