Glass composition formulated for a glass-metal bond of a tube collector and glass-metal bond made with glass of said glass composition

US8178451B2 · kind B2 · utility

Assignee

• Schott AG · DE

Inventors

• Erhard Dick · Mitterteich, DE
• Johann Collignon · Tirschenreuth, DE
• Wolfgang Zettl · Mitterteich, DE
• Stephan Tratzky · Mitterteich, DE

Key dates

• Filing date: Sep 11, 2009
• Grant date: May 15, 2012
• Expiry date: Jun 16, 2030

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E10/44
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

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: SiO2, 73-77 wt. %; B2O3, 6-<8 wt. %; Al2O3, 6-6.5 wt. %; Na2O, 5.5-7 wt. %; K2O, 1-3 wt. %; CaO, 0.5-3.2 wt. %; MgO, 0-2 wt. %; Fe2O3, 50-150 ppm; and TiO2 0-<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 ≦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.