REFRACTORY MATERIAL CONSISTING OF .BETA. ALUMINA

摘要

The invention covers a fused cast refractory material essentially consisting of .beta. alumina and having the following chemical analysis expressed as molar percentages: - 11.25% to 15.45% of at least one alkaline metal oxide selected from the group comprising Na2O, Li2O and K2O provided that Na2O represents at least 9.3%, - 0 to 2.97% SiO2, - 81.38% to 88.75% Al2O3, and - at most 0.2% impurities and in which .beta. alumina represents at least 98% of the crystallised phases. Use for the construction of glassmaking furnaces.