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BSU bulletin. Chemistry. Physics

Bibliographic description:
Ojovan M. I.
,
Sanditov D. S.
,
ATOMIC DISPLACEMENT ENERGY IN AMORPHOUS COMPOUNDS // BSU bulletin. Chemistry. Physics. - 2018. №1. . - С. 32-37.
Title:
ATOMIC DISPLACEMENT ENERGY IN AMORPHOUS COMPOUNDS
Financing:
Codes:
DOI: 10.18101/2306-2363-2018-1-32-37UDK: 539.4
Annotation:
Atomic displacement energy in multicomponent sheet and lead-silicate glasses is calculated from the free activation energy of a viscous flow. The value of Δεe is shown to remain constant in a rather wide range of temperatures in the glass transition region. Satisfactory agreement with calculations of displacement energy using the current formula incorporating the glass transition temperature and the fluctuation volume fraction frozen at this temperature is obtained. The validity of the above formula is confirmed not only at the glass transition temperature but also in the temperature region adjacent to it.
Keywords:
atomic displacement energy; glass transition region; amorphous compounds; lead-silicate glasses; viscosity; fluctuation of the volume; energy of delocalization of the at- om.
List of references:
Ojovan M. I. Configurons: Thermodynamic Parameters and Symmetry Changes at Glass Transition // Entropy. 2008. V. 10. P. 334–364.

Sanditov D. S. A criterion for the glass-transition // J. Non-Cryst. Solids. 2014. V. 385. P. 148–152.

Nemilov S. V. Thermodynamic and Kinetic Aspects of the Vitreous State. London; Tokyo; Roca Raton; Ann Arbor: CRC Press Inc., 1995. 213 p.

Sanditov D. S., Ojovan M. I. On relaxation nature of glass transition in amorphous materials // Physica B. 2017. V. 523. P. 97-113.

Sanditov D. S., Sydykov B. S. Free volume of amorphous solids in the models of delocalized atoms // Physics and Chemistry of Glasses: Eur. J. Glass Sci. Tehnol. Part B. 2014. V. 55, № 2. P. 97-102.

Sanditov D. S. Deformation activaton model of viscous flow of glass-forming liquids // J. Non-Cryst. Solids. 2014. V. 400. P. 12-20.

Williams M. L., Landel R. F., Ferry J. D. The temperature dependence of relaxation mechanisms in amorphous polymers and glass-forming liquids // J. Amer. Chem. Soc. 1955. V. 77, № 14. P. 3701–3707.