Arsenic and antimony free, titanium oxide containing borosilicate glass and methods for the production thereof

US9650289B2 · kind B2 · utility

Assignee

• Schott AG · DE

Inventors

• Holger Wegener · Alfeld, DE
• Rainer Schwertfeger · Eschershausen, DE
• Lenka Grygarova · Goslar, DE
• Reinhard Kassner · Delligsen, DE

Key dates

• Filing date: Aug 13, 2012
• Grant date: May 16, 2017
• Expiry date: Jul 30, 2033

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03C4/085
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Titanium oxide containing borosilicate glasses, which have been produced without the use of arsenic and antimony compounds, are provided. An environmentally friendly refining method for providing titanium oxide containing borosilicate glass is also provided. The method includes using oxygen containing selenium compounds as refining agents to provide glasses with good transmittance values in the infrared range and show no disturbing discolorations. The glasses of the present disclosure are particularly suitable for the production of IR light conductors, cover glasses for photo sensors, and UV filters.