METHOD FOR PRODUCING A GLASS ARTICLE

The invention relates to a method for producing a glass article having high hydrolytic resistance, wherein a glass tube consisting of borosilicate glass and having an A12O3 content of less than 1 weight -% and a ZrO2 content of 2 ? 12 weight -% and with a glass transition temperature Tg is first res...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	Christof Kass, Dr. Peter Nass, Dr. Malte Grimm
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS CHEMISTRY 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
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Beschreibung
Zusammenfassung:	The invention relates to a method for producing a glass article having high hydrolytic resistance, wherein a glass tube consisting of borosilicate glass and having an A12O3 content of less than 1 weight -% and a ZrO2 content of 2 ? 12 weight -% and with a glass transition temperature Tg is first reshaped into a glass article and is subsequently subjected to a thermal post-treatment. To reduce the alkali release of a glass article produced by said method, the method provides that during the thermal post-treatment the glass article is subjected over a treatment time of tB ? 5 min to a treatment temperature of TB ? Tg + 5 K and is subsequently cooled.