POLY-CRYSTALLINE SCINTILLATION MATERIALS IN THE FORM OF POWDERS PRODUCTION METHOD Russian patent published in 2019 - IPC C30B28/04 C30B29/28 C01F17/00 C01F7/02 B22F9/16 C09K11/78 C09K11/80 C04B35/01 C04B35/50 G01T1/202 A61B6/03 

FIELD: medicine; chemistry; physics.

SUBSTANCE: invention relates to the production technology of polycrystalline scintillation materials used in various fields of science and technology, most important of which are: medical and industrial tomographic scanners, customs control and radioactive materials distribution monitoring systems, radiological monitors, various detectors for scientific research, used in the high energy physics and astrophysics, oil and gas exploration geophysical research equipment. Scintillation powder with composition of (Gd,Y)₃(Ga,Al)₅O₁₂:Ce production method involves preparation of the starting components, Gd, Y, Ce, Ga, Al salts aqueous solutions with predetermined concentrations, these solutions mixing in the amount enabling the required components composition in the mixed solution, alkaline precipitator solution preparation, the starting components mixed solution pouring into the alkaline precipitator solution, the resulting reaction mixture heat treatment by the slow evaporation at temperature of up to 100 °C, heat treatment in air in the open container with a consistent increase in temperature to 450 °C, and then to 600 °C, followed by the heat treatment at temperature of 1,000–1,600 °C. Technical result of the invention is the possibility of express production of activated by cerium complex oxides with garnet structure scintillation powders, with the composition given by the generalized formula (Gd,Y)₃(Ga,Al)₅O₁₂:Ce, with exactly given composition.

EFFECT: obtained powder particles have dense microstructure, look transparent when observed in the optical microscope and demonstrate characteristic to this class of compounds high light output of scintillations.

1 cl, 6 dwg, 1 tbl, 1 ex