GLASS COMPOSITION Russian patent published in 2011 - IPC C03C3/62 

FIELD: construction.

SUBSTANCE: glass composition contains SiO₂, BaO, Li₂O, As₂O₃, Na₂O, K₂O, MgO, CaO, ZnO, PbO, SrO, ZrO₂, at least one component of the following group: Fe₂O₃, Cr₂O₃, MnO, NiO, CoO, at the following ratio of components, wt %: SiO₂ - 30.0-35.0; BaO - 1.0-2.0; Li₂O - 21.0-25.0; As₂O₃ - 4.0-5.0; Na₂O - 1.0-2.0; K₂O - 1.0-2.0; MgO -21.0-25.0; CaO - 1.0-2.0; ZnO - 1.0-2.0; PbO - 1.5-10.0; SrO - 1.0-2.0; ZrO₂ -1.0-2.0; at least one component of the following group: Fe₂O₃, Cr₂O₃, MnO, NiO, CoO - 0.1-2.0.

EFFECT: reduced temperature of glass boiling.

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