GLAZE Russian patent published in 1994 - IPC

FIELD: silicate technology. SUBSTANCE: glaze has, wt.- % silicon oxide (SiO₂) 41-47; aluminium oxide (Al₂O₃) 10.7-15.2; boron oxide (B₂O₃) 19.6-21.0; magnesium oxide (MgO) 1.3-2.0; sodium oxide (Na₂O) 4.3-5.0; zinc oxide (ZnO) 3.8-4.5; calcium oxide (CaO) 3.2-4.5; potassium oxide (K₂O) 2.8-3.0; strontium oxide (SrO) 2.2-2.7, and cerium oxide (CeO₂) 2.8-3.2. Glaze properties: thermal stability is 40-50 heat-changes, microhardness is 780± 5 kg/mm², resistance to cold is 54-56 cycles. EFFECT: enhanced quality of glaze. 1 tbl