VERRES D'ALUMINOSILICATE DE LITHIUM (PRECURSEURS DE VITROCERAMIQUE); VITROCERAMIQUES DE BETA-QUARTZ ET/OU DE BETA-SPODUMENE; ARTICLES EN LESDITES VITROCERAMIQUES; PROCEDES D'OBTENTION

摘要

The present invention relates to: - mineral materials selected from lithium aluminosilicate glasses containing vanadium, advantageously precursors of glass-ceramics, and glass-ceramics colored by vanadium containing solid solution(s) of ß-quartz or (and) of ß-spodumene as main crystalline phase: - articles in said mineral materials; as well as - methods for elaborating said glasses, glass-ceramics and articles in said glasses and glass-ceramics. The present invention was more particularly developed in the framework of optimizing the refining of lithium aluminosilicate glasses containing SnO2 as a fining agent in preparing glasses or glass-ceramics.