Abstract
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. Grüneisen; 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.
Original language | English |
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Pages (from-to) | 1097-1113 |
Number of pages | 17 |
Journal | Journal of Thermal Analysis and Calorimetry |
Volume | 142 |
Issue number | 2 |
Early online date | 29 Jan 2020 |
DOIs | |
Publication status | Published - 1 Oct 2020 |
Keywords
- Anharmonicity
- Gruneisen
- Heat capacity
- Interatomic potential
- Thermal expansion
- THERMODYNAMIC PROPERTIES
- SODIUM
- PRESSURE-DEPENDENCE
- GRUNEISEN-PARAMETER
- EQUATION-OF-STATE
- TEMPERATURE
- DEGREES-K
- ISOTHERMAL COMPRESSIBILITY
- LATTICE
- HEAT-CAPACITY