| abstract |
Product comprising - a sintered support constituted of an "aggregate" constituted of particles having a size of greater than 100 µm, the balance of said support being the "matrix", and - a protective layer at least partially covering the surface of said support, the aggregate representing more than 60% and less than 95% of the weight of said support and being constituted, for more than 80% by weight, of silicon carbide grains, the protective layer being constituted of a glass or of a glass-ceramic, and having the following chemical analysis, in percentages by weight on the basis of the oxides: - 45% ≤ SiO 2 ≤ 90%; - 1% ≤ manganese expressed in the form MnO ≤ 20%; - 2% ≤ aluminium expressed in the form Al 2 O 3 ≤ 15%; - other elements, apart from oxygen, expressed in an oxide form: ≤ 25%. |