Opacification of Glazes for Household Majolica

Abstract

Acompounded mixture of fritted white, bright, glass ceramic, glaze coating for household majolica in the system Na₂O–K₂O–CaO–B₂O₃–Al₂O₃–ZrO₂–SiO₂ is developed. The structure of the coating is distinguished by homogeneity and uniformity of the distribution of the crystalline formations over the entire volume of the glaze. The physical and chemical properties of the glaze coating (CLTE = (50.2 – 50.5) × 10 ^–7 K^–1, thermal resistance 150°C, whiteness 80 – 82%, brightness 87 – 89%, microhardness 5350 – 5400 MPa) attest an appropriate ratio of the crystalline and glassy phases in the glass ceramic coating formed.