Abrasive molten grains

摘要

The invention relates to molten grains having the following chemical composition in wt % in terms of oxides: Al2O3: balance to 100%; ZrO2+HfO2: 16-24%; MgO in an amount such that the weight ratio (ZrO2+HfO2)/MgO is between 25 and 65; other species: 0-2%. The grains can be used as abrasive grains.

主权项

1. Fused grains having the following chemical analysis, as percentages by weight on the basis of the oxides:
Al2O3: balance to 100%; ZrO2+HfO2: 16-24%; MgO in an amount ranging from greater than 0.35% to less than 0.80%;
wherein a (ZrO2+HfO2)/MgO weight ratio is 25 or more to less than 49; a proportion of zirconia stabilized in tetragonal form represents at least 30% to less than 66% of the total amount of zirconia; and other species: 0-2%.