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

• Main Authors: LIEBALD RAINER, WEISS EVELIN, BEER ULRIKE, SCHOBER PATRIK, HUBERT STEFAN, BEIER WOLFRAM, SCHNABEL ROLAND
• Format: Patent
• Language: English
• Published: 02.03.2004
• Edition: 7
• Subjects: CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS; CHEMISTRY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GLASS; JOINING GLASS TO GLASS OR OTHER MATERIALS; METALLURGY; MINERAL OR SLAG WOOL; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS; SURFACE TREATMENT OF GLASS; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS

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.