PHOTOLUMINESCENT MATERIAL OF RARE-EARTH ORTHOBORATE AND A METHOD FOR PRODUCTION THEREOF Russian patent published in 2019 - IPC C09K11/78 C09K11/55 C09K11/63 

FIELD: lighting.

SUBSTANCE: invention can be used in production of ecologically clean light sources. First one prepares initial mixture of the following components, mol%: potassium carbonate K₂CO₃ – 12.5; calcium carbonate CaCO₃ – 25; boric acid H₃BO₃ – 50, and rare-earth element of neodymium oxide Nd₂O₃ – 12.5. Obtained mixture is annealed at 650 °C for a day. Then the annealed powder is grinded, tableted, reheated to 850 °C and held at this temperature for 8–12 hours. Obtained photoluminescent material of rare-earth orthoborate has composition KCaNd(BO₃)₂, spatial group Pbca of orthorhombic system, parameters of lattice a=10.2069(5)Å, b=9.0293(4)Å, c=13.1634(5)Å, Z=8 and emits light in range of 850–1,080 nm.

EFFECT: invention widens the range of materials having photoluminescent properties.

2 cl, 3 dwg