Method of forming rare earth oxide ceramic scintillator with amm

Details Method of forming rare earth oxide ceramic scintillator with amm Method of forming rare earth oxide ceramic scintillator with amm

1991-03-22

1992-05-26

Derrington, James

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

264 12, 2523014R, C04B 3550

Patent

active

051165600

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.

REFERENCES:
patent: 4421671 (1983-12-01), Cusano et al.
patent: 4466929 (1984-08-01), Greskovich et al.
patent: 4466930 (1984-08-01), Greskovich et al.
patent: 4518545 (1985-05-01), Cusano et al.
patent: 4525628 (1985-06-01), DiBianca et al.
patent: 4747973 (1988-05-01), Cusano et al.
patent: 4755492 (1988-07-01), Greskovich
patent: 5021376 (1991-06-01), Nienburg

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