GLAZE Russian patent published in 2014 - IPC C03C6/02 

FIELD: chemistry.

SUBSTANCE: invention relates to technology of silicates and deals with compositions of glazes for application on facade ceramic tiles. Glaze contains, wt %: broken window or container glass 74-76; kaolin 3-4; melted alkalis NaOH and KOH 3-4; copper oxide 1-2; zinc oxide 3-4; bone ash 12-14. Frost resistance of glaze constitutes 35-40 cycles. Broken window and/or container glass is crushed, mixed with other components and melted at temperature 1400°C. Melt is granulated into water. Finished suspension is applied (by spraying, pouring) on tile surface, dried and burnt at temperature 900-950°C.

EFFECT: increased frost resistance of glaze.

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