Radiation-selective absorber coating, absorber tube and process for production thereof

US8318329B2 · kind B2 · utility

Assignee

• Schott AG · DE

Inventors

• Kamel Silmy · Mitterteich, DE
• Jan Schulte-Fischedick · Waldershof, DE
• Thomas Kuckelkorn · Idar-Oberstein, DE
• Christina Hildebrandt · Glückstadt, DE
• Wolfgang Graf · Sankt Goarshausen, DE
• Andreas Georg · Glückstadt, DE

Key dates

• Filing date: Feb 17, 2009
• Grant date: Nov 27, 2012
• Expiry date: Oct 13, 2030

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E10/40
• WIPO field: Thermal processes and apparatus
• WIPO sector: Mechanical engineering

Abstract

The radiation-selective absorber coating (20) has two barrier layers (24a, 24b), an IR-reflecting layer (21) arranged thereon, an absorption layer (22) arranged above the IR-reflecting (21) and an antireflection layer (23) over the absorption layer (22). The absorber tube (13) is a steel tube (1) with the radiation-selective absorber coating (20) applied to the outside thereof. In the process of coating the absorber tube (13) a first oxide barrier layer (24a) is applied to a steel tube by thermal oxidation; a second barrier layer (24b) is then applied by physical gas phase deposition of silicon with supply of oxygen; the IR-reflecting layer (21) is then applied by gas phase deposition of gold, silver, platinum or copper; the absorption layer (22) is then applied by deposition of aluminum and molybdenum; and a final antireflection layer (23) is applied by deposition of silicon with supply of oxygen.