Back to Search
Start Over
Thermal expansions of Ln2Zr2O7 (Ln = La, Nd, Sm, and Gd) pyrochlore
- Source :
- Journal of Applied Physics. 111:103535
- Publication Year :
- 2012
- Publisher :
- AIP Publishing, 2012.
-
Abstract
- The thermal expansions of the rare earth zirconate (Ln2Zr2O7, Ln = La, Nd, Sm, and Gd) pyrochlore were studied by the Debye and quasi harmonic approximation combined with the first principles calculations. The difference between CV and CP was obtained. The temperature dependence of thermal expansions is mainly caused by the restoration of thermal energy due to phonon excitations at relatively a low temperature. When the temperature is much higher than Debye temperature, i.e., above 600 K for Ln2Zr2O7 compounds, the volumetric coefficient is increased linearly by increasing the temperature. The calculations are in good agreement with the experiments.
Details
- ISSN :
- 10897550 and 00218979
- Volume :
- 111
- Database :
- OpenAIRE
- Journal :
- Journal of Applied Physics
- Accession number :
- edsair.doi...........073a5f718a3209ab2e382a04e4c65a40
- Full Text :
- https://doi.org/10.1063/1.4722174