Abstract
The non-Arrhenius temperature dependence of fluidity, [Formula: see text], of molten mixtures of calcium nitrate tetrahydrate and nickel(II) nitrate hexahydrate has been explained in terms of equations based upon the Vogel–Tammann–Fulcher (VTF) and the configurational entropy (CEM) models. The role of the relevant parameters in understanding the successive variations in their behaviour with concentration has been examined. The concentration dependence of fluidity has been explained satisfactorily by an isoenergetic equation. In addition to the linear dependence of the pre-exponential terms of the VTF and the Doolittle equations on the ideal glass-transition temperature, T0, and the molar intrinsic volume, V0, respectively, linear interdependence of the two thermodynamic parameters, T0 on V0, has been found. Linear dependence of the corrected activation energy, Ecor, on the V0 and the T0 values have been demonstrated in the system under investigation.
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