Glass for a cone of a display tube, display tube envelope comprising a cone of such a glass and method of manufacturing a cone from such a glass

摘要

A novel type of glass for a cone (3) of a display tube envelope (1), said glass being manufactured by recycling screen glass and cone glass of display tube envelopes which are to be recycled. A mixture of fragments of screen and cone glasses is supplemented with other glass-forming components to form a novel glass composition which can suitably be used in cone glass. The glass is characterized by a relatively high BaO and SrO content. The glass has an x-ray absorption mu of at least 65 cm-1 at 0.6 ANGSTROM . IMAGE