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High Temperature Viscosity

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Example Temperature-Viscosity PlotDetermination of the temperature-viscosity relationship of glass, which is essential to determine correct melting and heat treatment regimes in glass manufacture and processing. The temperature-viscosity relationship is directly linked to its chemical composition and our specialist knowledge in glass allows us to provide direct measurement and predictive modelling of this relationship for a range of glasses. 

A standard measurement may include viscosities at temperatures between approximately 800ºC and 1400ºC, although this range can be extended if necessary. This measurement range is sufficient for most commercial glasses, allowing extrapolation to higher and lower temperatures if required. 

For container glasses, float glasses and a range of other compositions, we also offer predictive computer modelling of the viscosity - temperature relationship. This is an inexpensive, rapid turnaround service, although in certain 
circumstances we recommend measurement in conjunction with predictive modelling. 

High Temperature Viscosity Measurement can be offered as a rapid turnaround predictive modelling service.

Measurement of High Temperature Viscosity allows a fuller understanding of glass properties. By determining the fixed points for glasses, shown in the diagram, it is possible to accurately estimate the working range and 
the relative machine speed of different glass compositions. 

Glass articles or fibres must often be melted and formed within tight viscosity ranges, so it is vital to know exact temperature – viscosity relations for different glasses, as these will be affected by composition, melting behaviour, 
time, temperature and other factors, all of which may impact upon production. 

Please contact us, or make an enquiry using the form above, if you have any bespoke requirements, require further information, or would like a quote for analysis.

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