Saint-gobain Centre De Recherches Et D'etudes Europeen

Arnaud Apheceixborde

Caroline Levy

Céline Delwaulle

Celine Delwaulle

A fused grain having the following chemical composition in percent by weight in relation to the oxides: ZrO: 16% to 30%, provided that HfO&#x3c;2%, AlO: percentage needed to bring the total to 100%, CrO: &#x2265;0.2%, TiO: &#x2265;0.5%, CrO+TiO: &#x3c;7%, other elements: &#x3c;3%, provided that SiO+CaO+MgO&#x3c;1.5%.

Molten alumina-zirconia grains

A method for manufacturing a molten material (the crystallized portion of which consists of a single crystalline phase), includes a) mixing raw materials so as to form a feedstock; b) melting the feedstock until a liquid mass reaches a temperature higher than the melting temperature Tf of the molten material obtained at the end of step e); c) cooling until the liquid mass is completely solidified to obtain a molten material, the amorphous phase of which is constitutes less than 80 wt % thereof; d) optionally crushing/grinding and/or performing selection by particle size on the molten material; e) optionally, heat-treating the molten material at a temperature which is an increment lower than the melting temperature of the molten material and is between Tf&#x2212;800&#xb0; C. (or 500&#xb0; C.) and Tf&#x2212;50&#xb0; C., for a period of time in a reducing environment; and f) optionally, crushing/grinding and/or performing selection by particle size on said molten material.

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Cavaillon, France

Arnaud Apheceixborde