Brittle article comprising joined-together hardened glass and/or glass-ceramic parts and method of making same

US6698242B1 · kind B1 · utility

Assignee

• Schott Glas · DE

Inventors

• Wolfram Beier · Essenheim, DE
• Ulrike Beer · Neu-Ulm, DE
• Roland Schnabel · Hofheim, DE
• Evelin Weiss · Mainz, DE
• Stefan Hubert · Bubenheim, DE
• Patrik Schober · Nieder-Olm, DE
• Rainer Liebald · Nauheim, DE

Key dates

• Filing date: Feb 15, 2000
• Grant date: Mar 2, 2004
• Expiry date: Feb 15, 2020

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S228/903
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

In the method according to the invention cold or unheated hardened glass and/or glass-ceramic parts are bonded together with a metallic ductile joining material, preferably silver, copper, aluminum or an alloy of those metals, to form a brittle article. The parts to be joined in an initial unheated state are placed with the metallic ductile joining material between them in a high frequency alternating field with frequencies preferably from 100 to 500 kHz. Then the joining material is inductively heated locally to melt it by means of the alternating field and the parts are pressed together to form a sufficiently strong bond between the parts.