Method for bonding components made of material with a high silicic acid content

US7937968B2 · kind B2 · utility

Assignee

• HERAEUS QUARZGLAS GMBH & CO. KG · DE

Inventors

• Armin Maul · Veitshöchheim, DE
• Thorsten Herbert · Saarburg, DE
• Jurgen Weber · Oberhausen, DE
• Waltraud Werdecker · Hanau, DE
• Rolf Gerhardt · Hammersbach, DE

Key dates

• Filing date: Jan 18, 2005
• Grant date: May 10, 2011
• Expiry date: Oct 25, 2027

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03C27/10
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

In a known method for bonding components made of material with a high silicic acid content by means of a substance to substance bond, a SiO2-containing bonding mass is formed between connecting surfaces of the components. In order to provide for cost-efficient manufacture of a thermally stable composite, the invention proposes to generate a SiO2-containing bonding mass that is generic with regard to the material with a high silicic acid content, comprising the following procedural steps: provision of a slurry containing amorphous SiO2 particles; formation of a slurry mass between the connecting surfaces which are fixed in position with regard to each other; drying of the slurry mass; and solidification of the slurry mass by heating under formation of the SiO2-containing bonding mass. A component assembly manufactured according to the method of the invention shows high temperature resistance and thermal fatigue resistance and can also be used in contamination-sensitive applications. The component assembly is characterized by an amorphous SiO2-containing bonding mass, whose chemical composition is generic with regard to the material with the high silicic acid content of the basic mat…