The Vogel–Fulcher–Tammann equation, also known as Vogel–Fulcher–Tammann–Hesse equation or Vogel–Fulcher equation (abbreviated: VFT equation), is used to describe the viscosity of liquids as a …

Consequently, ignoring the physical meaning of T∞, the VFTH and WLF form may be universal for glass-forming liquids and terminal flow of polymers. The rationality of T∞ = 0 for the application of the …

Aug 1, 2007 · In this work VFTH equation was applied over a wide temperature range (between glass transition temperature, Tg and the melting point, Tm) for 38 oxide glasses, considering simple, binary …

Nov 13, 2004 · The Vogel−Fulcher−Tammann−Hesse (VFTH) equation has been the most widespread tool for describing the temperature dependence of the characteristic times of the cooperative …

At the time of development of free volume theory, two important empirical equations of viscosity were known. They are the Doolittle (1951) equation (3.01) and the Vogel, Tamman and Fulcher (VTF) …

Tg ≈ 100 s − T g ) 0 where T 0 is the VFT approximation of the ideal glass temperature, D fragility strength coefficient and Tg denotes the glass temperature. This relation may be considered as the …

The three-parameter VFTH equation serves as basis for treatment of viscous systems, being able to model Z in a wide temperature range for many different glass-forming liquids.

The VFTH function is now expressed as a linear relationship between the left-hand side of eq 4 and temperature, where B and T0 can be obtained from the corresponding slope and intercept.

In this work VFTH equation was applied over a wide temperature range (between glass transition temperature, Tg and the melting point, Tm) for 38 oxide glasses, considering simple, binary and …

Despite this restriction, the VFTH equation has shown to adjust very well to experimental data in wide temperature range. Simple criteria were developed in the past to characterize glass-forming liquids, …