| abstract |
Melted grain having the following chemical composition: - more than 10% and less than 50% alumina Al O; - more than 10% and less than 50% titanium oxide TiO; - more than 21% and less than 50% of zirconia; more than 1% and less than 10% of a compound selected from the group consisting of MgO, CaO, FeO, CrO, MnO, LaO, YO, GaO and mixtures thereof; less than 20% SiO silica; less than 10% of a compound chosen from the group consisting of alkaline and alkaline earth oxides and mixtures thereof; less than 2% of other oxide species; the percentages being percentages by mass on the basis of the oxides. Application to the melting of metals. |