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US 8,273,673 B2Granted
Doped refractory with a high zirconia content
AssigneeSaint-Gobain Centre De Recherches Et D'Etudes Europeen
InventorsIsabelle Cabodi, Michel Gaubil
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Abstract
The invention provides a fused cast refractory product with a high zirconia content comprising, as. a percentage by weight based on the oxides: ZrO2+Hf2O: >85%; SiO2: 6% to 12%; Al2O3: 0.4% to 1%; Y2O3: 0.2%; a dopant selected from the group formed by Nb2O5, Ta2O5, and mixtures thereof, in a quantity such that the molar ratio ZrO2/(Nb2O5+Ta2O3) is in the range 200 to 350.
Claims26
A fused cast refractory product with a high zirconia content comprising, as a percentage by weight based on the oxides:
- ZrO2 +Hf2O:
- >85%;
- SiO2:
- 6% to 12%;
- Al2O3:
- 0.4% to 1%;
- Y2O3:
- ≦0.2%;
- and
- a dopant selected from the group consisting of Nb2O5, Ta2O5, and mixtures thereof.
7 more elements
Dependencies are inferred from the claim text.