LUMINESCENT MATERIAL AND METHOD FOR ITS PRODUCTION Russian patent published in 2023 - IPC C09K11/54 C09K11/78 C09K11/80 C03B27/12 C03B32/02 C03C10/00 B82Y30/00 

FIELD: luminescent materials and glass ceramics.

SUBSTANCE: invention relates to the field of luminescent materials and glass ceramics with quantum dots and can be used in the manufacture of sources of white warm and natural light. The initial mixture containing, wt.%: SiO₂ - 45.7-56.1; ZnO - 8.8-11; K₂CO₃ - 14.2-16.3; Na₂CO₃ - 14.9-17.1; H₃BO₃ - 5-8; CdS - 1-1.9, placed in a furnace heated to 750-800°C, heat-treated in air at 1300-1450°C for 2.5-4 hours, quenched in air for 2-3 minutes and annealed in an air atmosphere at 500-550°C for 0.5-1.0 h. Then inertial cooling is carried out to room temperature. The resulting silicate glass is crushed, mixed with Lu₃Al₅O₁₂:Ce and Y₃Al₅O₁₂:Ce, taken in a molar ratio of 1:1, at a mass ratio of mixture : silicate glass, constituting (6-20) : (80-94), pressed into tablets and sintered on air at 610-680°C for 3-5 hours. The resulting luminescent material based on silicate glass contains, wt.%: silicon oxide - 56-66, zinc oxide - 10-13, potassium oxide - 10-12, sodium oxide - 10-12, boron oxide - 3-5, cadmium sulfide - 1-2, additionally doped with Lu₃Al₅O₁₂:Ce and Y₃Al₅O₁₂:Ce, while cadmium sulfide nanoparticles have a size of 4-10 nm.

EFFECT: luminescent material has a high color rendering index and a wide luminescence spectrum.

2 cl, 3 dwg, 3 ex