Schott Ag

Schott Glas

Plansee Se

Ralf Diezel

Franz Ott

Karin Naumann

Otmar Becker

Gerhard Dipl-Ing Leichtfried

Joerg Hinrich Fechner

Jörg Hinrich Fechner

Wolfram Knabl

Brigitte Hueber

Rainer Haspel

Herman Walser

The invention relates to a borosilicate glass having the following composition (in wt. % based on oxide content): between 55 and 80 of SiO; between 8 and 25 of BO; between 0.5 and 10 of AlO; between 1 and 16 of LiO+NaO+KO; between 0 and 6 of MgO+CaO+SrO+BaO; between 0 and 3 of ZnO; between 0 and 5 of ZrO; between 0 and 5 of BiO; and between 0 and 3 of MoO; the sum of the BiOand MoOamounting to between 0.01 and 5. The invention also relates to a fluorescent lamp, especially a miniature fluorescent lamp.

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

A cold cathode fluorescent lamp () has feedthrough pins () made from molybdenum or a molybdenum alloy that form a glass-metal seal () with a glass composed of 55-75 wt. % SiO, 13-25 wt. % BO, 0-10 wt. % AlO, 5-12 wt. % alkali oxides, 0-3 wt. % alkali earth oxides, 0-5 wt. % ZrO, 0-10 wt. % TiOund 0-5 wt. % remaining oxides. The lamp has hollow cathodes () made from a material of the group molybdenum, molybdenum alloys, niobium, niobium alloys, and the lamp is manufactured in a compact form using conventional manufacturing parameters, and the resulting lamp has crack free, long-term vacuum-tight glass-metal seals.

Cold cathode fluorescent lamp with molybdenum electrode

The process of the invention produces alkali-free aluminosilicate glass having an AlO-content of more than 12% by weight with the addition of from 0.005% by weight to 0.6% by weight of sulfate for batch formulation.

Process for producing alkali-free aluminosilicate glass

The invention relates to a method for producing aluminosilicate glass that is devoid of alkali and that has a BOcontent of between 0 and &#x3c;5 wt.-% and a BaO content in excess of 5.5 wt.-%. Said method is characterised by the addition of between 0.05 wt.-% and 1.0 wt.-% SnOduring the preparation of the mixture.

Method for producing aluminosilicate glass

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Mitterteich, Germany

Ralf Diezel