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Temperature dependence of elastic constants and thermal expansion coefficient for NaCl crystals
Author(s) -
Thomas L. M.,
Shanker J.
Publication year - 1996
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221950204
Subject(s) - thermal expansion , thermodynamics , atmospheric temperature range , materials science , isothermal process , volume (thermodynamics) , elastic modulus , thermal , bulk modulus , physics
The second‐order elastic constants C 11 , C 12 , and C 44 , isothermal bulk modulus B T , and volume thermal expansion coefficient α are calculated for NaCl crystals in the temperature range (294 to 766 K) using Tallon's model based on the concept of modified Anderson‐Grüneisen parameters. The results obtained in the present study are compared with the experimental values reported in the literature. There is good agreement between calculated and experimental values for V/V 0 , C 11 , C 44 , B T , and α. It is found that C 11 , C 44 , and B T decrease whereas C 12 and α increase with increase in temperature.