Saint-Gobain Centre De Recherches Et D'etudes Europeen

Saint-Gobain Glass France

David Langohr

Samuel Marlin

Sylvain Petigny

Jean-Philippe Savary

Anthony Gaeta

Béatrice Joncourt

The invention relates to a fused grit having the following chemical analysis, in wt %: ZrO+HfO: 38.0-46.0%; AlO: the remainder up to 100%; SiO: 0.20-0.60%; YO: 0.45 to 0.70%; TiO: 1.00 to 2.00%; other oxides: &#x3c;1.00%, the ratio of YO/SiObeing 0.80 to 2.00, and the tetragonal phase being 60 to 90% of the weight of the zirconia, the remainder being in monoclinic form.

Molten grains of alumina-zirconia

A molten alumina/zirconia grain mixture having the following chemical composition, in wt %: ZrO+HfO: 35 to 45.5%; AlO: 43.7 to 65%; other oxides: &#x3c;10%; SiO: &#x3c;0.8%, which simultaneously adheres to a granulometric condition and to a densimetric condition.

Fused alumina/zirconia grain mixture

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Conflans Sainte Honorine, France

David Langohr