Methods and apparatus for homogenizing molten glass

The level of precious-metal inclusions in glass products, e.g., glass substrates for liquid crystal displays, is reduced by stirring molten glass in a stir chamber ( 11 ) under conditions such that the magnitude of the shear stress tau on the chamber's wall ( 19 ) and on the surfaces of the sti...

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Bibliographische Detailangaben
Hauptverfasser:	GOLLER MARTIN H, THOMAS ROBERT R, MURPHY JAMES P, NOLET DANIEL A
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING FREQUENCY-CHANGING GLASS MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES METALLURGY MINERAL OR SLAG WOOL MIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PHYSICS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF TRANSPORTING
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Beschreibung
Zusammenfassung:	The level of precious-metal inclusions in glass products, e.g., glass substrates for liquid crystal displays, is reduced by stirring molten glass in a stir chamber ( 11 ) under conditions such that the magnitude of the shear stress tau on the chamber's wall ( 19 ) and on the surfaces of the stirrer ( 13 ) is reduced while at the same time, the Q.E product for the system is kept high, where Q is the flow of glass through the stirring system and E is the system's stirring effectiveness.