Method of forming rare earth oxide ceramic scintillator with ammonium dispersion of oxalate precipitates
US5116560A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 22, 1991 |
| Grant date | May 26, 1992 |
| Priority date | — |
| Expiry date | Mar 22, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01T1/2023
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of forming polycrystalline rare earth oxide ceramic scintillators formed by dissolving a mixture of oxides of the scintillator in an aqueous hydrochloric or nitric acid solution to form a rare earth solution, precipitating oxalates from the rare earth solution, calcining the oxalates to form the respective oxides, cold pressing the oxides to form a compact, and sintering the compact in a reducing atmosphere or vacuum to form the scintillator, the method being improved by precipitating the oxalates by admixing the rare earth solution with an oxalic solution comprised of, oxalic acid and ammonium ions in an amount that disperses the oxalate precipitates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.