Patent ID: 7842633
Filing Date: 2010-11-30
Classification: C04B

Abstract:
1. A high-zirconia cast refractory material which comprises: 85-95 wt % of ZrO 0.1 to less than 0.8 wt % of Al glass-forming oxides including 4-12 wt % of SiO glass-modifying oxides including less than 0.04 wt % of Na 0.05-0.4 wt % of Y 0.3 wt % or less of total content of Fe less than 0.01 wt. % CuO, and less than 0.01 wt % P wherein the molar ratio of the glass-forming oxides to the glass-modifying oxides is 20-100, and wherein said refractory material has an electric resistance of at least 200 Ω·cm after standing for 12 hours at 1500° C.