On the entropy of a glass-liquid quasiphase transition

Сандитов, Д. С.; Munkueva, S. B.; Batlaev, D. Z.; Сандитов, Б. Д.

doi:10.1134/s0036024411120302

Cited by 3 publications

(2 citation statements)

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“…In terms of the excited state model [4][5][6], the constancy of the parameter ratio (Eq. (2)) in the Bar tenev-Ritland equation arguably originates in the criterion for glass transition conditions (Eq.…”

Section: C ≈ ≈mentioning

confidence: 99%

“…In this work, we used both relaxation theory [1][2][3] and the excited state model [4][5][6] to provide a possible explanation for the observed constancy. According to the excited state model, the liquid-glass transition occurs when the average thermal energy of the oscilla tion of atoms in a crystal lattice (3kT) becomes equal to or less than the enthalpy of the ultimate elastic deformation of interatomic bonds (ΔH e ): 3kT ≤ ΔH e .…”

Section: C ≈ ≈mentioning

confidence: 99%

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Cooling rate dependency of fluctuations in the melt volume of amorphous materials

Sangadiev

2012

Russ. J. Phys. Chem.

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It has been shown that the physical properties of any amorphous material in the glass transition region change in a similar manner. The cooling rate depen dence q = dT/dt of glass transition temperature T g can thus be described universally by the Bartenev-RitlandAs can be seen from the table, the ratio of the two vari ables in this formula has the same constant value for any glasslike material [2]:In this work, we used both relaxation theory [1-3] and the excited state model [4-6] to provide a possible explanation for the observed constancy. According to the excited state model, the liquid-glass transition occurs when the average thermal energy of the oscilla tion of atoms in a crystal lattice (3kT) becomes equal to or less than the enthalpy of the ultimate elastic deformation of interatomic bonds (ΔH e ): 3kT ≤ ΔH e .The ΔH e /kT g ratio remains ~3 at T = T g [5], con firming that the fraction of the fluctuation volume (f = ΔV e /V) formed by the displacement of structural units (an atom or group of atoms) from their equilibrium Abstract-Fluctuations in the melt volume of the amorphous materials as a function of cooling rate is estab lished. The observed dependency is similar to the one found for the glass transition temperature (the Bar tenev-Ritland equation). The constant ratio of the empirical parameters in the equation is explained in terms of the excited state model.

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Section: C ≈ ≈mentioning

confidence: 99%

Section: C ≈ ≈mentioning

confidence: 99%