METHOD OF PRODUCING A LOW-AGGLOMERATED NANOSIZED PRECURSOR FOR SYNTHESIS OF SOLID SOLUTIONS OF YTTRIUM-ALUMINUM GARNET WITH RARE-EARTH ELEMENT OXIDES Russian patent published in 2019 - IPC C30B29/28 C01F1/00 C01F7/02 C01F17/00 C04B35/44 C04B35/50 C04B35/626 B22F9/04 B22F9/24 H01S3/16 G02B1/02 B82B3/00 B82Y40/00 

FIELD: manufacturing technology.

SUBSTANCE: invention relates to the technology of obtaining compounds of complex oxides with a garnet structure containing rare-earth elements, which can be used in the technology of synthesis of optical ceramic materials of laser quality when creating active bodies of solid-state lasers of different geometries. Method of obtaining a small agglomerated nano-sized precursor for synthesis of solid solutions of yttrium-aluminum garnet with oxides of rare-earth elements (REE) involves preparation of a mother solution of salt cations of specified composition, based on formula (Y_1-xREE_x)₃Al₅O₁₂, where x is fraction of rare-earth element cation or sum of fractions of REE cations introduced into yttrium-aluminum garnet and substituting yttrium cations by dissolving chlorides or sulphates of yttrium, aluminum and rare-earth metals in water with subsequent evaporation to reduction of initial volume by 2 times, at solution temperature of 125 °C; dispersion of obtained mother solutions in mixture of aqueous ammonia solution with 25 % concentration and hydrogen peroxide of 30–40 % concentration in ratio of volumes of ammonia solution:solution of hydrogen peroxide (6–2):1 with subsequent cooling to 0 °C of obtained precipitate, which is decanted in deionised water to pH=7 and then 2–3 portions of hydrogen peroxide of 30–40 % concentration, wherein the last stage of decantation and washing is carried out with hydrogen peroxide of the same concentration, followed by drying in a vacuum drying cabinet at temperature of 60–80 °C.

EFFECT: method of producing less agglomerated nano-sized precursor powders is simple, as a result of its use, the time for obtaining the end product is reduced, homogeneity and fineness of the obtained product is increased.

1 cl, 7 dwg, 1 tbl, 5 ex