Oxynitride - glass compositions, their precursors and their use for the production of glass-ceramics compositions and composite materials

摘要

The invention relates to a glass composition oxyazotée of formula: & br / (see appended drawing in bopi) & br / & & br / in which & br / (see appended drawing in bopi) & br / & & br / and with the condition: 2x + 4y + 3 = 2u + 3v br / & it also relates to a glass-ceramic composition of the same formula and having a crystalline phase of the type of a cordierite. & br / the glass composition is obtained by melting a mixture of magnesium oxide and / or magnesium silicate, silica and of an aluminum nitride obtained by reacting ammonia with aluminum oxide.