Process for superficial deionization of a glass ribbon, device therefor and obtained deionized products

The process consists in passing a hot glass ribbon or sheet (1) through a direct electrical field established between electrodes to generate a corona discharge. The electrodes comprise an anode (4) arranged so as to cover the middle part of the ribbon and two cathodes (5) arranged so that each cover...

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Bibliographische Detailangaben
Hauptverfasser:	BEGHIN, BENOIT, PERAUD, JEAN-CLAUDE
Format:	Patent
Sprache:	eng ; fre ; ger
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 process consists in passing a hot glass ribbon or sheet (1) through a direct electrical field established between electrodes to generate a corona discharge. The electrodes comprise an anode (4) arranged so as to cover the middle part of the ribbon and two cathodes (5) arranged so that each covers a side region of the ribbon, so as to displace the alkali metal and alkaline-earth metal ions into the depth and towards the side portions of the ribbon. A glass is obtained in which one face is free from alkali metal and possibly alkaline-earth metal ions at the surface and in which the nature of the other face is not modified.