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

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...

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Bibliographische Detailangaben
Hauptverfasser: HASPEL RAINER, FECHNER JOERG, OTT FRANZ, DIEZEL RALF
Format: Patent
Sprache:eng
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Zusammenfassung: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.