COMPOSITION OF LOW-MELTING GLASS FOR GLUING OPTICAL AND LASER ELEMENTS FROM SINGLE CRYSTALS AND YTTRIUM ALUMINIUM GARNET CERAMICS AND METHOD FOR GLUING OPTICAL AND LASER ELEMENTS WITH THIS COMPOUND Russian patent published in 2023 - IPC C03C3/74 C03C4/00 C03C27/00 C03C8/24 B32B7/23 B32B7/12 

FIELD: inorganic materials.

SUBSTANCE: low-melting glass is intended for gluing optical and laser elements made of single crystals and yttrium aluminium garnet (YAG) ceramics and contains components in the following ratio, mol.%: 37.5-38.0 PbO; 21.0-21.5 B₂O₃; 21.0-22.0 SiO₂; 2.5-2.9 Y₂O₃; 6.7-7.3 ZnO; 8.30-11.3 Al₂O₃. Low-melting glass is melted using corundum crucibles at a temperature of 1100-1150°C in the air for 0.5-2 hours depending on the batch weight of 10-50 g. The resulting melt is cast into brass or steel moulds. Between the YAG elements to be glued, a powder of the produced glass with a particle size of less than 1 mcm or a plate of the produced glass corresponding in size to these elements is placed, then they are placed in a vacuum furnace at a pressure of 1 mmHg and temperature 650-700°C for 0.5 h. Optical contact between the layers is provided, the difference in CLTE does not exceed ±0.5% and transparency is in the region of 700-1100 nm.

EFFECT: improved performance.

2 cl, 2 dwg, 3 tbl