Uv-blocking borosilicate glass, the use of the same, and a fluorescent lamp

摘要

The invention relates to a borosilicate glass having the following composition (in wt. % based on oxide content): between 55 and 80 of SiO₂; between 8 and 25 of B₂O₃; between 0.5 and 10 of Al₂O₃; between 1 and 16 of Li₂O+Na₂O+K₂O; between 0 and 6 of MgO+CaO+SrO+BaO; between 0 and 3 of ZnO; between 0 and 5 of ZrO₂; between 0 and 5 of Bi₂O₃; and between 0 and 3 of MoO₃; the sum of the Bi₂O₃ and MoO₃ amounting to between 0.01 and 5. The invention also relates to a fluorescent lamp, especially a miniature fluorescent lamp.