Production of vitroceramic of beta - quartz and / or beta - spodumene, in such vitroceramic; vitroceramic, navel piercings in said precursors vitroceramic and lenses.

摘要

The present invention relates to: - a process for the production of vitroceramics beta - quartz and / or beta - spodumene; - a process for the production of articles in the vitroceramic; - new vitroceramics beta - quartz and / or beta - spodumene; - of the articles by said novel vitroceramic; and - of the glasses of alumino silicate - lithium, precursors of such novel vitrocéramiques.la present invention is based on the use, by way of a refining agent of the glass, glass-ceramic precursor, fluorine and of at least one oxide of element multivalent.