Formation of a glaze coating structure based on low-boron zirconium-containing glass

Glass–ceramic glazes for ceramic tiles: a review

“…The proposed mechanism involves several successive stages, namely grain dissolution in the liquid phase, material transport by diffusion 21 through the melt and recrystallisation at the grain surface, which favours the growth of larger grains by an Ostwald ripening mechanism.A significant goal in zircon glaze research has been the development of glaze compositions with decreased boron anhydride content, due to the high cost of boron-containing materials.However, boron anhydride is a necessary component of glaze glasses because it is an exceptional flux that ensures a low melting point along with a significant decrease in the thermal expansion coefficient. Bobkova et al[65] studied the synthesis of opacified zirconiumcontaining glazes from frits with 4 mol% ZrO 2 and a B 2 O 3 content in the range of 7.5-15.0 mol%. Low B 2 O 3 content (7.5 mol%) leads to glasses with liquid phase separation, which has been studied by IR spectroscopy.…”