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US 6,270,702 B1Granted
Method for manufacturing scintillator ceramic
AssigneeSiemens Aktiengesellschaft
InventorJuergen Leppert
Life of this patent
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Abstract
In a method for manufacturing scintillator ceramic by hot pressing a powder containing at least one rare earth oxisulfide (rare earth oxisulfide powder), in order to avoid light propagation due to carbonized imperfections in the ceramic, sulfur oxyacid anions are added to the rare earth oxisulfide powder prior to hot pressing.
Claims5
A method for manufacturing a scintillator ceramic, comprising the steps of:
- providing a powder containing at least one rare earth oxisulfide;
- adding 0.0001 to 0.05 mole of ions, selected from the group consisting of sulfate ions and sulfite ions, to said powder per mole of sulfide ions in said powder;
- said ions being added in at least one form selected from the group consisting of a sulfate of said at least one rare earth, a sulfite of said at least one rare earth, a compound R2A, and a compound RA, wherein R is selected from the group consisting of H, Li, Na, K, Cs and Nh4, and wherein A is selected from the group consisting of SO4, SO3, HSO4, HSO, and S2O3;
- and
- after adding said ions, hot-pressing said powder at a temperature of at least 800° C. in an environment selected from the group consisting of a protective gas and a vacuum.
2 more elements
Dependencies are inferred from the claim text.