Fused ceramic product

Abstract

Process for manufacturing a product, including the following successive steps: a) mixing raw materials to form a starting feedstock; b) melting the starting feedstock so as to form a molten liquid; c) solidifying the molten liquid so as to obtain a fused product comprising crystals linked by a glassy phase; and d) crystallization heat treatment of the glassy phase of said fused product, in which the composition of the starting feedstock is adapted in order to manufacture a product having the following chemical composition, as weight percentages based on the oxides, and for a total of 100%: 40%≦(ZrO2+HfO2)≦94%; 4%<CeO2<31%; 0%≦Y2O3; 0%≦Al2O3; 2%≦SiO2; 0%≦MgO; 0%≦TiO2; and other oxides≦1%.

Dependencies are inferred from the claim text.