Coated metal elements for producing glass

US7648732B2 · kind B2 · utility

Assignee

• Schott AG · DE

Inventors

• Franz Ott · Mitterteich, DE
• Dirk Gohlke · Mainz, DE
• Joerg Witte · Darmstadt, DE

Key dates

• Filing date: Nov 29, 2007
• Grant date: Jan 19, 2010
• Expiry date: Nov 29, 2027

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P40/50
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The coated noble metal element used in glass manufacture, such as a noble metal pipe, has an uncoated side that contacts a glass melt and an H2-impervious layer or an H2-impervious and O2-impervious layer, which is provided on a side opposite from the uncoated side. The H2-impervious layer or H2-impervious and O2-impervious layer is heat-resistant and is liquid or solid. In one process for providing the layer on the noble metal element an empty space between the noble metal element and a ceramic insulating jacket is filled with a coating material, and then the coating material is melted so that it wets a surface of the noble metal element. The coating material can include glass cullet, crushed glass or glass powder or is a mixture of crushed glass and ground ceramic material.