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Study of Temperature Dependence of Bulk Modulus and Interatomic Separation for Ionic Solids
Author(s) -
He Qing,
Yan ZuTong
Publication year - 2001
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 - 10.1002/1521-3951(200102)223:3<767::aid-pssb767>3.0.co;2-x
Subject(s) - debye model , thermodynamics , melting temperature , work (physics) , materials science , ionic bonding , bulk modulus , debye , condensed matter physics , physics , ion , quantum mechanics , composite material
The temperature dependence of the bulk modulus B T ( T ) and interatomic separation r ( T ) are investigated from room temperature up to the melting temperature for sixteen ionic solids. In the present paper, the relations for B T ( T ) and r ( T ) are developed with the approximation that the Anderson‐Grüneisen parameter δ T is independent of temperature ( T ) when T is higher than the Debye temperature Θ D . A phenomenological equation of state is also obtained. These relations can be used to predict the values of B T ( T ) and r ( T ) at different temperatures. The results are compared with available experimental data and are discussed in view of recent research in the field of high temperature physics. A very good agreement between theory and experiment suggests the validity of the present work.