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AssigneeSociete Europeenne des Produits Refractaires
InventorsMichel Marc Gaubil, Yves Marcel Leon Boussant-Roux, Emmanuel Jean-Marie Sertain, Alain Paul Bernard Zanoli
Estimating the term…
Oxidized alumina-zirconia-silica (AZS) refractories containing 40 wt % to 55 wt % Al2O3, 32 wt % to 45 wt % ZrO2, 10 wt % to less than 16 wt % SiO2 and 1 wt % to 3 wt % of an alkali metal oxide selected from Na2O, K2O and mixtures thereof have a microstructure essentially comprising alpha-alumina crystals, free zirconia crystals, eutectic crystals and an intercrystalline vitreous phase. At least in an active area, more than 20% by number of the free zirconia crystals have a dendritic shape and are interleaved with each other and with eutectic crystals and at least 40% by number of the dendritic free zirconia crystals have a dimension greater than 300 μm.
Oxidized alumina-zirconia-silica (AZS) refractories containing 40 wt % to 55 wt % Al2O3, 32 wt % to 45 wt % ZrO2, 10 wt % to less than 16 wt % SiO2 and 1 wt % to 3 wt % of an alkali metal oxide selected from Na2O, K2O and mixtures thereof, having a microstructure essentially comprising alpha-alumina crystals, free zirconia crystals, eutectic crystals and an intercrystalline vitreous phase, refractories wherein, at least in the active area thereof, more than 20% by number of said free zirconia crystals have a dendritic shape and are interleaved with each other and with eutectic crystals and at least 40% by number of said dendritic free zirconia crystals have a dimension greater than 300 μm.
Dependencies are inferred from the claim text.