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Indian Journal of Pure & Applied Physics (IJPAP) >
IJPAP Vol.50 [2012] >
IJPAP Vol.50(06) [June 2012] >
| Title: | Thermoelastic properties of alkali halides at high temperatures |
| Authors: | Sunil, K
Sharma, B S |
| Keywords: | Alkali halides
Bulk modulus
Thermal expansivity
Equation of state
Interatomic potential |
| Issue Date: | Jun-2012 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | The thermoelastic
properties of materials at high temperatures, specifically the thermal
expansivity and the isothermal bulk modulus have been studied using the Anderson formula for
thermal expansivity and the interatomic potential functions within the
framework of the Born model. We have considered sixteen alkali halides with
NaCl structure, and calculated their properties for a wide range of
temperatures starting from room temperature up to their melting temperatures.
Potential energy curves have been plotted and used to determine interatomic
distances at the melting points. The results for interatomic distances, thermal
expansivity and isothermal bulk modulus at different temperatures have been
found to compare well with the available experimental data. The Hildebrand
equation of state has been used to predict the pressure-volume-temperature
relationship in case of NaCl using the Born-Mayer exponential potential
function. The results,thus, obtained are found to present good agreement with
the measured data. |
| Page(s): | 387-397 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-1041 (Online); 0019-5596 (Print) |
| Source: | IJPAP Vol.50(06) [June 2012]
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