Abstract
An empirical formula relating the heat capacity jump in the glass transition range to the temperature coefficient of the viscosity logarithm for oxide glass-forming materials over a wide range of compositions is derived. A method is proposed for evaluating the heat capacity and the heat capacity jump in the glass transition range from composition of glass-forming melts in the oxide system containing 64 components. The results of calculations are compared with the experimental data available in the SciGlass information system. The root-mean-square deviation between the calculated and experimental heat capacities of melts is equal to ∼2.5 J/(g-atom K), which corresponds to a relative error of 8–10%. The relationships proposed can be used for estimating relaxation changes of the heat capacity in the glass transition range in glasses for which this property is not studied experimentally.
Published Version
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