The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 26, 2006
Filed:
Dec. 10, 2004
Marie Jaqueline Monique Comte, Fontenay aux Roses, FR;
Sophie Peschiera, Champagne sur Seine, FR;
Marie Jaqueline Monique Comte, Fontenay aux Roses, FR;
Sophie Peschiera, Champagne sur Seine, FR;
Eurokera, Chateau-Thierry, FR;
Abstract
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 β-quartz or of β-spodumene, essentially have the following composition, expressed as percentages by weight of oxides: 65 to 70% of SiO; 18 to 23% of AlO; >4 to 5% of LiO; 0 to <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 β-OH higher than 0.2 mm, preferably higher than 0.4 mm.