METHOD OF PRODUCING LUMINESCENT CERAMICS BASED ON COMPLEX OXIDES WITH GARNET STRUCTURE Russian patent published in 2020 - IPC C04B35/44 C04B35/50 C09K11/78 C09K11/80 B82Y40/00 

FIELD: medicine.

SUBSTANCE: invention relates to methods of producing ceramic luminescent and scintillation materials. Such materials are used as scintillators for X-ray computed tomography systems, inspection equipment, and so forth, as well as luminophors for solid-state lighting systems. Disclosed method enables to obtain nanostructured powders and luminescent ceramics based thereon, containing simultaneously Gd, Ga, Ce, Al and optionally Y. Method includes the following sequential steps: preparation of aqueous solutions of salts of initial components with accurately known concentrations, combining said solutions in the required amount to provide the required composition of the components, preparing the precipitation solution, adding the solutions of the initial components to the precipitation solution, sediment separation, drying, thermal treatment at temperature 800–1000 °C, compaction and sintering at temperature of not less than 1500 °C. For compliance with stoichiometry, solutions of initial components are divided into 2 or more groups and deposited separately, wherein amount of precipitator is selected so as to ensure most complete deposition of components in group. Gadolinium and gallium enter into different groups. Obtained precipitation is mixed, combined drying is carried out, and then - thermal treatment of obtained product and all subsequent stages.

EFFECT: technical result of invention is possibility of obtaining luminescent ceramics based on complex oxides with garnet structure of exactly specified composition.

1 cl, 2 ex, 9 dwg