| 摘要 |
A novel fused and cast refractory product with a high zirconia content having improved electrical resistivity includes, as a percentage by weight relative to the oxides and for a total of more than 98.5%: ZrO2+Hf2O: >85% SiO2: 2% to 10% Al2O3: 0.1% to 2.4%, with Al2O3/SiO2<0.5 Y2O3: <=1%, B2O3: <1.5%; and a 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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