GLAZE Russian patent published in 1994 - IPC

FIELD: building materials. SUBSTANCE: glaze has, wt.-%: silicon oxide (45,0-50,0 БФ SiO₂) 45-55; aluminium oxide (6,0-7,0 БФ Al₂O₃) 6-7; boron oxide (18,0-19,5 БФ B₂O₃) 18.0-19.5; calcium oxide (CaO) 7.4-9.8; zinc oxide (ZnO) 7.5-8.0; cryolite (6,0-8,2 БФ Na₃AlF₆) 6.0-8.2; barium oxide (BaO) 1-2, and sodium chloride (NaCL) 0.5-0.8. Fluorspar (БФ CaF₂) at concentration 0.3-0.5 wt.-% can be additionally added to the glaze composition. Glaze property: roasting temperature is 700-750 C. Glaze is used for coating building structures. EFFECT: enhanced quality of glaze. 2 cl, 1 tbl