vitroceramic of beta - quartz and / or β spodumene, glasses precursors, in said vitroceramic, production of said vitroceramic and articles

摘要

The present invention relates to: - new vitroceramics beta - quartz and / or beta - spodumene; - of the articles by said novel vitroceramic; - of the glasses of alumino silicate - lithium, precursors of said novel vitroceramic; - of the processes of preparation of said novel vitroceramic and articles of said new vitrocéramiques.la present invention is based on the use, by way of a refining agent of the glass-ceramic precursor glass, of sno2 and br.