Abstract: A process is provided for a heat-resistant product that has a support chosen from a glass fiber and an assembly of glass fibers, and a coating extending over the outer surface of said support, in a zone called the “protected zone.” The coating has particles having a mean size of less than 100 nm and has more than 95% by mass of Al2O3 and/or ZrO2, referred to as “protective particles.” The protective particles cover more than 50% and less than 90%of the protected zone, as percentage by surface area. The process includes the step of subjecting the heat-resistant product to a temperature of greater than 600° C. for a duration of greater than 0.5 hours.

Abstract: A sintered product made from a starting batch containing 5 to 50% zircon and having the following average chemical composition, in weight percentages on the basis of the oxides and for a total of 100%: silica and zirconia, the zirconia content (ZrO2) being at least 64%, at least 0.2% of a dopant selected from V2O5, Nb2O5, Ta2O5, and mixtures thereof, optionally, a stabilizer selected from Y2O3, MgO, CaO, CeO2, and mixtures thereof, at a content of 6% or less, “other oxides” at a content of 6.7% or less.

Abstract: A sintered product having an average chemical composition such that, in weight percentages on the basis of the oxides: Cr2O3=80.0-99.0%; 0.5%?TiO2?9.0%; 0.2%?MgO?3.0%; and ZrO2?5.0%, provided that the ratio of TiO2/MgO is between 1.5 and 9.0 and the molar ratio TiO2/Cr2O3 is less than 0.12.

Abstract: A sintered product having an average chemical composition such that, in weight percentages on the basis of the oxides: Cr2O3=80.0-99.0%; 0.5%?TiO2?9.0%; 0.2%?MgO?3.0%; and ZrO2?5.0%, provided that the ratio of TiO2/MgO is between 1.5 and 9.0 and the molar ratio TiO2/Cr2O3 is less than 0.12.

Abstract: A sintered product presenting a mean chemical composition such that, in percentages by weight based on the oxides: Cr2O3: 72.0%-98.9% 2%<Al2O3?20% 0.1%?TiO2?6.0% ZrO2<4.0% SiO2?0.9%.

Abstract: The invention provides a sintered product presenting an apparent density greater than 4.00 g/cm3 and having the following mean chemical composition, as a percentage by weight based on the oxides and for a total of 100%: Al2O2: complement to 100% 16%?Cr2O3?29.5% TiO2 in a quantity such that the Cr2O3/TiO2 weight ratio is greater than 16 and less than 35, other species: ?1% Application as an electrode bushing block.

Abstract: The present invention relates to a sintered product elaborated from a starting charge containing 75-99% of zircon, in mass percentage based on the oxides and having the following average weight chemical composition, in mass percentages based on the oxides 60%?ZrO2?72.8%, 27%?SiO2?36%, 0.1%?B2O3+GeO2+P2O5+Sb2O3+Nb2O5+Ta2O5+V2O5, 0.1%?ZnO+PbO+CdO, B2O3+GeO2+P2O5+Sb2O3+Nb2O5+Ta2O5+V2O5+ZnO+PbO+CdO?5%, 0%?Al2O3+TiO2+MgO+Fe2O3+NiO+MnO2+CoO+CuO?5%, other oxides: ?1.5%, for a total of 100%. Notably used in a glass furnace.

Abstract: Sintered product produced from a starting charge containing 75 to 99% zircon, and having the following average chemical composition by weight, the percentages by weight being based on the oxides: 60%<ZrO2+HfO2<75%; 27%<SiO2<34%; O<TiO2; O<Y2O3<3.5%; 0.1%<Nb2O5+Ta2O5<=5%; and other oxides: <1.5%; for a total of 100%, The sintered product may be used in a glass furnace.

Abstract: A sintered product presenting a mean chemical composition such that, in percentages by weight based on the oxides: Cr2O3: 72.0%-98.9% 2%<Al2O3?20% 0.1%?TiO2?6.0% ZrO2<4.0% SiO2?0.9%.

Abstract: The present invention relates to a sintered product elaborated from a starting charge containing 75-99% of zircon, in mass percentage based on the oxides and having the following average weight chemical composition, in mass percentages based on the oxides 60%?ZrO2?72.8%, 27%?SiO2?36%, 0.1%?B2O3+GeO2+P2O5+Sb2O3+Nb2O5+Ta2O5+V2O5, 0.1%?ZnO+PbO+CdO, B2O3+GeO2+P2O5+Sb2O3+Nb2O5+Ta2O5+V2O5+ZnO+PbO+CdO?5% 0% ?Al2O3+TiO2+MgO+Fe2O3+NiO+MnO2+CoO+CuO?5%, other oxides: ?1.5%, for a total of 100%. Notably used in a glass furnace.

Abstract: The invention provides a sintered product presenting an apparent density greater than 4.00 g/cm3 and having the following mean chemical composition, as a percentage by weight based on the oxides and for a total of 100%: Al2O2: complement to 100% 16%?Cr2O3?29.5% TiO2 in a quantity such that the Cr2O3/TiO2 weight ratio is greater than 16 and less than 35, other species: ?1% Application as an electrode bushing block.

Abstract: Sintered product produced from a starting charge containing 75 to 99% zircon, and having the following average chemical composition by weight, the percentages by weight being based on the oxides: 60%<ZrO2+HfO2<75%; 27%<SiO2<34%; O<TiO2; O<Y2O3<3.5%; 0.1%<Nb2O5+Ta2O5<=5%; and other oxides: <1.5%; for a total of 100%, The sintered product may be used in a glass furnace.

Abstract: A sintered product made from a starting batch containing 5 to 50% zircon and having the following average chemical composition, in weight percentages on the basis of the oxides and for a total of 100%: silica and zirconia, the zirconia content (ZrO2) being at least 64%, at least 0.2% of a dopant selected from V2O5, Nb2O5, Ta2O5, and mixtures thereof, optionally, a stabilizer selected from Y2O3, MgO, CaO, CeO2, and mixtures thereof, at a content of 6% or less, “other oxides” at a content of 6.7% or less.