Refractory product having high zirconia content
AssigneeSaint-Gobain Centre De Recherches Et D'Etudes Europeen
InventorsIsabelle Cabodi, Michel Gaubil
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Abstract
The invention relates to a molten cast refractory product comprising, in weight percentages on the basis of the oxides and relative to a total of 100% of the oxides: ZrO2+Hf2O is the remainder making up 100%, 4.5%<SiO2<6.0%, 0.80%≦Al2O3<1.10%, 0.3%<B2O3<1.5%, Ta2O5+Nb2O5<0.15%, Na2O+K2O<0.1%, K2O<0.04%, CaO+SrO+MgO+ZnO+BaO<0.4%, P2O5<0.05%, Fe2O3+TiO2<0.55%, and other oxide species <1.5%, the “A/B” ratio of the Al2O3/B2O3 contents by weight being between 0.75 and 1.6. The invention can be applied to glass melting furnaces.
Claims10
A fused cast refractory product comprising, in percentages by weight based on the oxides and for a total of 100% of the oxides:
- ZrO2+Hf2O:
- complement to 100%
- 4.5%<SiO2<6.0%
- 0.80%≦Al2O3<1.10%
- 0.3%<B2O3<1.5%
- Ta2O5+Nb2O5<0.15%
- Na2O+K2O<0.1%
- K2O<0.04%
- CaO+SrO+MgO+ZnO+BaO<0.4%
- P2O5<0.05%
- Fe2O3+TiO2<0.55%
- other oxide species:
- <1.5%,
- the ratio “A/B” of the contents by weight Al2O3/B2O3 being between 0.75 and 1.6.
Dependencies are inferred from the claim text.