| abstract |
A sintered refractory product having a matrix-bonded refractory granulate, said matrix having, in its mass, a crystallized SiAION phase of the formula SixAlyOuNv, wherein - x is greater than or equal to 0 and less than or equal to 1; y is greater than 0 and less than or equal to 1; u is greater than or equal to 0 and less than or equal to 1; v is greater than 0 and less than or equal to 1; at least one of the x, y, u and v stoichiometric indices being equal to 1, said product comprising a content greater than 5% in said SiAION phase; - a boron content other than in the form of a hexagonal phase of BN greater than 0.05% and less than 3.0%, and - an Si3N4 content of less than 5%, in percentages by mass on the basis of said product. |