Societe Europeenne Des Produits Refractaires

Saint-gobain Centre De Recherches Et D'etudes Europeen

Michel Marc Gaubil

Isabelle Cabodi

Alain Paul Bernard Zanoli

Emmanuel Jean-Marie Sertain

Yves Marcel L&eacute;on Boussant-Roux

Thierry Bruno Jacques Colozzi

Yves Marcel Leon Boussant-Roux

Yves Marcel Léon Boussant-Roux

Oxidized alumina-zirconia-silica (AZS) refractories containing 40 wt % to 55 wt % Al O , 32 wt % to 45 wt % ZrO , 10 wt % to less than 16 wt % SiO and 1 wt % to 3 wt % of an alkali metal oxide selected from Na O, K O 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 &mgr;m.

Fused cast products based on alumina-zirconia-silica with an improved microstructure

Fused cast AZS products of reduced cost

Growing community of inventors

Avignon, France

Michel Marc Gaubil