GLASS-LIKE COVER Russian patent published in 2007 - IPC C03C8/10 C03C3/72 C04B41/86 

FIELD: glass industry.

SUBSTANCE: invention relates to compositions of glass-like covers used for applying on articles made of ceramics, glass and metal. Proposed glass-like cover comprises SiO₂, Al₂O₃, B₂O₃, K₂O, Na₂O, CaO and, additionally, PbO and CuO in the following ratio of components, wt.-%: SiO₂, 20.0-26.0; Al₂O₃, 4.0-10.0; B₂O₃, 40.0-46.0; K₂O, 4.0-10.0; Na₂O, 2.0-4.0; CaO, 4.0-10.0; PbO, 4.0-10.0, and CuO, 2.0-4.0. Invention provides increasing value of the thermal linear expansion coefficient of glass-like cover.

EFFECT: improved and valuable property of glass-cover.

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