Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Date of Patent
February 2, 2010
Patent Application Number
11892569
Date Filed
August 24, 2007
Patent Primary Examiner
Patent abstract
The invention provides a novel fused and cast refractory product with a high zirconia content having improved electrical resistivity. Said refractory product comprises, as a percentage by weight relative to the oxides and for a total of more than 98.5%:ZrO2+Hf2O: >85%SiO2: 1% to 12%Al2O3: 0.1% to 2.4%, with Al2O3/SiO2<0.5Y2O3: ≦1%,B2O3: <1.5%; anda dopant selected from the group formed by V2O5, CrO3, Nb2O5, MoO3, Ta2O5, WO3, and mixtures thereof, in a weighted quantity such that:0.2%≦2.43V2O5+8.84CrO3+1.66Nb2O5+6.14MoO3+Ta2O5+3.81WO3.
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