Abstract
Reaction between α, β-Al2O3 ceramics (produced by fusion cast method) and Ba-Sr-alkali-silicate glass was studied on samples from glass melting tank. This tank had been used for about 6.5 years. Dendritic leucite (KAlSi2O6) crystals were observed at the interface between ceramics and glass. These crystals were about 120μm long at the position of the glass meniscus line. Leucite was crystallized in Al2O3-rich liquid due to the corrosion of α, β-Al2O3 ceramics. β-Al2O3 crystals in the ceramics showed no morphological change but chemical substitution of K, Ba and Sr for Na occurred. Leucite and β-Al2O3-like crystals are occasionally found as a defect in glass production. It is clear that these crystals are formed at the interface between α, β-Al2O3 ceramics and molten glass.
