METHOD OF PRODUCING DIOPSIDE GLASS (VERSIONS) Russian patent published in 2020 - IPC C03B19/00 

FIELD: technological processes.

SUBSTANCE: invention relates to a method of producing mineral material-based dolomite (CaMg(CO₃)₂) and silicon dioxide (pure quartz sand) of diopside glass, close to composition of MgCaSi₂O₆, with different functional properties, in particular, for production of luminescent and colored diopside glass with additives of rare-earth oxides, which can be used for production of industrial, jewelry and decorative-art products. Method comprises preparation of a charge by heat treatment of a mixture of mineral material dolomite and silicon dioxide in molar ratio of 1:2 in an open alundum crucible by heating to 1,200 °C, melting of the prepared charge in a glass-carbon crucible in an inert atmosphere using high-frequency heating with melt overheating to 1,600–1,700 °C till clarification of melt and hardening of melt in mode of switched off furnace. Rare-earth oxides, such as praseodymium, neodymium, samarium, europium, terbium or dysprosium, are added to prepared charge in amount of 1–30 wt%.

EFFECT: use of dolomite simplifies preparation of charge, since dolomite contains a calcium and magnesium ratio close to both in diopside and required for production of diopside glass.

4 cl, 3 tbl, 3 dwg