Technique for estimating the viscosity of molten silica glass on the kinetics of the collapse of the glass capillary
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The kinetics of the collapse of the melt glass capillary has been analyzed. The relation coupling the collapse time with the initial parameters—viscosity of molten glass, surface tension, and geometrical sizes of the cross section of the collapsed capillary—has been derived. A technique for estimating the viscosity of molten glass based on measuring the capillary collapse time has been elaborated. This technique has been tested on silica capillaries collapsed in a high-temperature oven of a drawing tower in the temperature interval of 1700–2050°C.
Keywordsviscosity of molten glass silica capillary capillary collapse
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