Journal
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
Volume 142, Issue 2, Pages 1097-1113Publisher
SPRINGER
DOI: 10.1007/s10973-020-09370-y
Keywords
Anharmonicity; Gruneisen; Heat capacity; Interatomic potential; Thermal expansion
Funding
- [0330-2019-0004]
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The coefficient of thermal expansion of a solid can be derived from (1) anharmonicity of atomic vibrations; (2) lattice dynamics; (3) equation of state by G. Mie; (4) equation of state by E. Gruneisen; and (6) potential of interatomic interaction. Only the last theory in this list provides us with the equation describing correctly all features in the thermal expansion: (1) proportionality between thermal expansion and heat capacity; (2) various values of plateau for the coefficient of thermal expansion at temperatures close to Debye temperature; and (3) acceleration of the thermal expansion in the vicinity of melting point.
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