Zentrum für Glas- und Umweltanalytik GmbH, Hohe Straße 45, 98693 Ilmenau
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Viscosity-temperature-curve

This curve is a graphic depiction of the correlation between ambient temperature and viscosity of glasses.

Viscosity is usually displayed logarithmically.

The arithmetical correlation is described by the Vogel-Fulcher-Tamann (VFT) equation in literature. The coefficients of the VFT equation for a glass can be calculated from the measured values of the transformation temperature, the Littleton point and the working point. The VFT curve can then be displayed graphically.