CRYSTAL GLASS Russian patent published in 2008 - IPC C03C3/78 

FIELD: technology of silicates, glass industry.

SUBSTANCE: invention relates to barium crystal glass compositions that can be used for preparing light dispersers, articles of decorative-artistic designation and high quality dishware. Proposed crystal glass comprises the following components, wt.-%: SiO₂, 55.0-58.0; Na₂O, 3.7-4.7; K₂O, 14.0-16.0; ZnO, 0.3-0.5; BaO, 18.0-23.0; Sb₂O₃, 0.35-0.45; Er₂O₃, 0.05-0.15; SrO, 0.3-0.5, and GeO₂, 2.0-3.0. Invention provides increasing light refraction index of crystal glass.

EFFECT: improved and valuable property of crystal glass.

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