Highly thermally stressable glass for light bulbs and its use

US8367574B2 · kind B2 · utility

Assignee

• Schott AG · DE

Inventors

• Erhard Dick · Mitterteich, DE
• Ingo Kipnik · Idar-Oberstein, DE

Key dates

• Filing date: Aug 24, 2010
• Grant date: Feb 5, 2013
• Expiry date: Aug 16, 2031

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03C3/093
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The alkaline earth metal aluminosilicate glass for light bulbs with molybdenum parts has a composition (in percent by weight on an oxide basis) of SiO2, 56-60; Al2O3, 17-18; B2O3, 0.5-2; MgO, 0.5-2; CaO, >14-15.5; SrO, 0-3; BaO, 6-8; ZrO2, 0-5; CeO2, 0-0.1 and TiO2, 0-0.5.