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  • Vogel-Fulcher-Tammann Model

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    The Vogel-Fulcher-Tamman (VFT) equation is a model for the temperature-dependence of the dynamic viscosity of glass and other liquid materials like water, petroleum or molten metal. The inflection point of the logarithmic curves for almost all glass materials is found to be 10<sub>12</sup> Pa s. The corresponding temperature is called transformation temperature. If glass is cooled below the t...
    Tags: glassviscosity
    Added by Martin on 2010-07-22 15:59


    Vogel-Fulcher-Tammann Model The Vogel-Fulcher-Tamman (VFT) equation is a model for the temperature-dependence of the dynamic viscosity of glass and other liquid materials like water, petroleum or molten metal. The inflection point of the logarithmic curves for almost all glass materials is found to be 10<sub>12</sup> Pa s. The corresponding temperature is called transformation temperature. If glass is cooled below the transformation temperature then brittleness occurs.