A method is described with which the viscosity of quartz glass at temperatures up to 2100 deg C can be determined in the range of log n (dPa s) from 5.5 to 12. Originally it consisted of a torsion method developed by Weiss (Osram). However, using the same equipment the torsion method has been complemented by a fibre elongation method. It is shown that the results from the torsion measurement and the fibre elongation measurement fit extremely well.
Origin
Ned Philips Bv
Journal Title
Fundamentals Of The Glass Manufacturing Process 1991. Esg Conf. 18-21
Sector
Glass Fibre
Class
GF 100