GLAZE Russian patent published in 1994 - IPC

FIELD: building materials. SUBSTANCE: glaze has, wt.-%: silica (SiO₂) 43.34-44.45; aluminium oxide (Al₂O₃) 6.36-6.46; ferric oxide (Fe₂O₃) 4.05-4.58; calcium oxide (CaO) 10-30-11.32; magnesium oxide (MgO) 1.57-1.63; sodium oxide (Na₂O) 3.89-3.93; potassium oxide (K₂O) 1.17-1.19; boron oxide (B₂O₃) 21.29-22.10; zinc oxide (ZnO) 0.43-0.48; chrome oxide (Cr₂O₃) 0.28-0.37; copper oxide (CuO) 2.20-2.48; ferrous (II) oxide (FeO) 0.08-0.10; nickel oxide (NiO) 0.14-0.16; titanium oxide (TiO₂) 0.05-0.07; barium oxide (BaO) 2.14-2.24; sulfur (III) oxide (SO₃) 0.54-0.61. Glaze properties: range of coating melting on is 850-950 C, luster is 75-79%, TCLE is TCLE·10^-7 deg^-1 63,9-65,7. Glaze is used for making of decorative coating in ceramic plate manufacture calcining at the high-speed regimes. EFFECT: enhanced quality of glaze. 2 tbl