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Kinetic phenomena in non-crystalline materials studied by thermal analysis

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Abstract

The structural relaxation and viscosity behavior of Ge38S62 glass has been studied by thermomechanical analysis. The relaxation response to any thermal history is well described by the Tool-Naraynaswamy-Moynihan model. The apparent activation energy of structural relaxation is very close to the activation energy of viscous flow (Eη=478±12 kJ mol-1). However, the activation energy of crystal growth obtained by optical microscopy is about one half of this value. Similar result has been obtained from isothermal DSC measurement (Ea=220±20 kJ mol-1). The kinetic analysis of these data reveals interface controlled crystal growth with zero nucleation rate.

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Authors and Affiliations

  1. Department of Physical Chemistry, Joint Laboratory of Solid State Chemistry Nám. Čs, University of Pardubice, Faculty of Chemical Technology, Legií 565, Pardubice, 532 10, Czech Republic

    J. Málek & J. Sháněová

  2. Department of Inorganic Technology, Nám. Čs. Legií, University of Pardubice, Faculty of Chemical Technology, 565 Pardubice 532 10, Czech Republic

    P. Pustková

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  1. J. Málek
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  2. P. Pustková
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  3. J. Sháněová
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Málek, J., Pustková, P. & Sháněová, J. Kinetic phenomena in non-crystalline materials studied by thermal analysis. Journal of Thermal Analysis and Calorimetry 72, 289–297 (2003). https://doi.org/10.1023/A:1023900610216

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