Fusion-cast refractory with high electrical resistivity
AssigneeRefractory Intellectual Property GmbH & Co. KG
InventorsAmul Gupta, Stephen M. Winder
Life of this patent
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Abstract
A fusion-cast refractory is provided. The refractory comprises 0.8% to 2.5% Al2O3, 4.0% to 10.0% SiO2, 86% to 95% ZrO2, 0.1% to 1.2% B2O3, up to 0.04% Na2O, up to 0.4% CaO, up to 0.1% Fe2O3 and up to 0.25% TiO2.
Claims9
A refractory consisting essentially of 0.96% to 1.1% Al2O3, 6.6% to 8.8% SiO2, 89.3% to 91.2% ZrO2, 0.6% to 0.9% B2O3, up to 0.02% Na2O, up to 0.1% CaO, up to 0.1% FeO3, and up to 0.1% TiO2.
A refractory consisting essentially of 0.96% to 1.1% Al2O3, 6.6% to 8.8% SiO2, 89.3% to 91.2% ZrO2, 0.6% to 0.9% B2O3, up to 0.1% CaO, up to 0.1% FeO3, and up to 0.1% TiO2, with MgO, P2O5, and Na2O being absent.
A refractory consisting of 0.96% to 1.1% Al2O3, 6.6% to 8.8% SiO2, 89.3% to 91.2% ZrO2, 0.6% to 0.9% B2O3, up to 0.1% CaO, up to 0.1% FeO3, and up to 0.1% TiO2, with MgO, P2O5, and Na2O being absent, wherein the refractory has an electrical resistance of at least 250 ohm-cm at 1625° C.
Dependencies are inferred from the claim text.