PHOTOLUMINESCENT MATERIAL OF NaSrYb(BO)COMPOSITION AND ITS PRODUCTION METHOD Russian patent published in 2022 - IPC C09K11/78 C09K11/55 C09K11/63 C01B35/12 C01F11/00 C01F17/30 C01D13/00 

FIELD: chemistry.

SUBSTANCE: invention relates to luminophores with the general formula AВС(ВO₃)₂, where A, B, C are cations of alkaline, alkaline earth, and rear earth metals emitting light in the infrared region. Photoluminescent material of NaSrYb(BO₃)₂ composition emits light in the infrared region, in the range from 950 to 1050 nm, and has a P2₁/m spatial group of monoclinic syngony, lattice parameters a=9.0561(6) b=5.29230(5) с=6.4267(4) β=118.528(4)°. A method for the production of photoluminescent material of NaSrYb(BO₃)₂ composition by two-stage solid-phase synthesis includes preparation of a mixture of components taken in a stoichiometric ratio, containing, respectively, wt.%: sodium carbonate Na₂CO₃ – 10.04, strontium carbonate SrCO₃ – 27.97, Yb₂O₃ – 37.33, and boric acid Н₃ВO₃ – 24.66. The mixture is heated, at the first stage, to 650°C for at least 5 h, ground to obtain homogenous mass, then heated, at the second stage, to 900°C for at least 12 h.

EFFECT: group of inventions provides for expansion of the arsenal of materials having photoluminescent properties.

2 cl, 4 dwg, 1 ex