GLASS Russian patent published in 2008 - IPC C03C3/95 

FIELD: glass industry.

SUBSTANCE: invention proposes glass comprising the following components, wt.-%: SiO₂, 57.5-62.5; B₂O₃, 8-12; ZnO, 8-10; K₂O, 2-4; Na₂O, 2-4; CaO, 2-4; CdO, 0.5-1.5; Se, 0.3-0.5; Al₂O₃, 2-4; MgO, 2-4; S, 0.1-0.2; La₂O₃, 0.5-1; Sb₂O₃, 0.2-0.4; BaO, 0.3-0.5, and ZrO₂, 2-4._{Invention provides thermal stability of glass at temperature 270-280°C and enhancing thermal stability of glass. Proposed glass is used in instrument making and making articles of household designation.}

EFFECT: improved and valuable properties of glass.