abstract |
The invention relates to a molten alumina/zirconia grain mixture having the following chemical analysis, in wt %: ZrO 2 + HfO 2 : 35 to 45.5%; Al 2 O 3 : 43.7 to 65%; Other oxides: < 10%; SiO 2 : < 0.8%. The invention simultaneously adheres to a granulometric condition and to a densimetric condition. |