Schott Ag

Johann Collignon

Stephan Tratzky

Erhard Dick

Wolfgang Zettl

The glass-metal bond for a tube collector includes a glass tube and metal part bonded to the glass tube. In order to match the thermal expansion properties, the glass tube has the following composition: SiO, 73-77 wt. %; BO, 6-&#x3c;8 wt. %; AlO, 6-6.5 wt. %; NaO, 5.5-7 wt. %; KO, 1-3 wt. %; CaO, 0.5-3.2 wt. %; MgO, 0-2 wt. %; FeO, 50-150 ppm; and TiO0-&#x3c;100 ppm. The ratio of the sum of the alkaline-earth metal oxides (in mol %) to the sum of the alkali metal oxides (in mol %) is &#x2266;0.6. The metal part is preferably made of metal material no. 1.3981 according to DIN 17745. The glass composition itself is also part of the invention.

Growing community of inventors

Tirschenreuth, Germany

Johann Collignon