Eurokera

Marie Jaqueline Monique Comte

Sophie Peschiera

The present invention relates to novel glass and glass-ceramic materials, articles made from said novel glass-ceramics and to methods of preparing said novel glass-ceramics and articles. Said novel, transparent, translucent or opaque glass-ceramics, which contain, as main crystalline phase, a solid solution of &#x3b2;-quartz or of &#x3b2;-spodumene, essentially have the following composition, expressed as percentages by weight of oxides: 65 to 70% of SiO; 18 to 23% of AlO; &#x3e;4 to 5% of LiO; 0 to &#x3c;1% of MgO; 1 to 3% of ZnO; 0 to 2% of BaO; 1.8 to 4% of TiO; 1 to 2.5% of ZrO; 0.4 to 1% of KO and/or NaO; with, advantageously, an effective and non-excess amount of at least one fining agent. The glass-ceramic material is also characterized by a water content of &#x3b2;-OH higher than 0.2 mm, preferably higher than 0.4 mm.

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Fontenay aux Roses, France

Marie Jaqueline Monique Comte