Glass ceramic with specially designed surface and method for producing same

A glass ceramic is provided that has an upper surface, a lower surface, and a surface zone of at least 10 nm thickness that is substantially amorphous so that a content of crystalline phases in the surface zone is at most 20 vol %. The glass ceramic has at least one lateral pattern with periodic and...

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Bibliographische Detailangaben
Hauptverfasser:	Pawlowski Edgar, Beier Wolfram, Bonitz Ralf
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS CHEMISTRY CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION GLASS HEATING JOINING GLASS TO GLASS OR OTHER MATERIALS LIGHTING MACHINE TOOLS MECHANICAL ENGINEERING METAL-WORKING NOT OTHERWISE PROVIDED FOR METALLURGY MINERAL OR SLAG WOOL OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS OTHER DOMESTIC STOVES OR RANGES PERFORMING OPERATIONS PHYSICS RANGES SOLDERING OR UNSOLDERING SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS SURFACE TREATMENT OF GLASS TRANSPORTING VENTILATING WEAPONS WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	A glass ceramic is provided that has an upper surface, a lower surface, and a surface zone of at least 10 nm thickness that is substantially amorphous so that a content of crystalline phases in the surface zone is at most 20 vol %. The glass ceramic has at least one lateral pattern with periodic and/or quasi-periodic features with a mean feature spacing of not more than 200 μm. The features are defined by depressions in the material of the surface zone so that the pattern as a whole does not protrude beyond the surface level. The features have a depth that is smaller than a thickness of the surface zone and do not extend into the region of the glass ceramic that has a higher content of crystalline phases.