| abstract |
Fused grains having the following chemical composition, in weight percentages on the basis of the oxides: more than 15% of Al 2 O 3 and less than 55% of Al 2 O 3 , - more than 20% and less than 45% of TiO 2 , - more than 3% and less than 30% of SiO 2 , - less than 20%, in total, of at least one oxide chosen from ZrO 2 , Ce 2 O 3 , HfO 2 , - less than 1% of MgO, - a total sum amount of the oxides CaO, Na 2 O, K 2 O, SrO, B 2 O 3 , BaO greater than 1% and less than 15%. Ceramic product or material obtained by sintering said grains. |