DEVITRIFICATION-RESISTANT COATING FOR HIGH-SILICA GLASSES

摘要

A devitrification-resistant glaze for high-silica glasses, particularly effective in inhibiting surface devitrification induced by contact with food-ash at elevated temperatures, formed from a coating consisting essentially, in weight percent, of about 25-85 percent Al2O3 and 15-75 percent ZrO2, and optionally containing up to about 10 percent Ta2O5. The coating is preferably applied in the form of an aqueous slurry which is dried and fired to produce a vitreous glaze.