Process for melting and refining silica-based glass

A process for making silica-based glass includes: (a) forming a glass precursor melt that includes glass network formers and glass network modifiers, the glass precursor melt being at a temperature in the range of 900 DEG C to 1700 DEG C and having a viscosity of not more than 30 Pa.s, and (b) refin...

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Bibliographische Detailangaben
Hauptverfasser:	LEIDY, D. WAYNE, DEWET-SMITH, DAWID, CLARK, TERENCE JOHN, FAYERWEATHER, CARL LUCAS, SWILER, DANIEL RUSSELL, HIXSON, BRETT EVAN
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS CHEMISTRY GLASS JOINING GLASS TO GLASS OR OTHER MATERIALS MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES 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:	A process for making silica-based glass includes: (a) forming a glass precursor melt that includes glass network formers and glass network modifiers, the glass precursor melt being at a temperature in the range of 900 DEG C to 1700 DEG C and having a viscosity of not more than 30 Pa.s, and (b) refining the glass precursor melt. Either or both steps (a) and (b) can include stirring and/or be carried out under reduced pressure to enhance refining. The refined glass precursor melt preferably is mixed with additional materials including silica (SiO2) to form a silica-based glass melt.