Analysis of elastic constants and thermal energy of ionic materials

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Abstract:

Expressions for the temperature dependence of elastic constants have been formulated by taking into account volume dependence of the Anderson–Grüneisen parameters. These expressions have been applied to ionic materials such as NaCl, KCl, MgO, and CaO to determine elastic constants at different temperatures. It is found that the linear relationship between isothermal bulk modulus and thermal energy (E th) is also applicable to other elastic constants. This linear relationship is valid, starting from room temperature.

Keywords: 62.20; 65.40.−b; 65.70

Document Type: Research Article

DOI: http://dx.doi.org/10.1139/p11-105

Publication date: November 2, 2011

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