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Thermal transport properties of halide solid solutions: Experiments vs equilibrium molecular dynamics
Aïmen E Gheribi1, Mathieu Salanne2, Patrice Chartrand1
1CRCT-Centre for Research in Computational Thermochemistry, Department of Chemical Engineering,École Polytechnique, P.O. Box 6079, Station Downtown, Montréal, Québec H3C 3A7, Canada.
Equilibrium molecular dynamics (EMD) simulations accurately predict the thermal transport properties of (Na,K)Cl solid solutions. This study validates EMD
Area of Science:
- Materials Science
- Condensed Matter Physics
- Computational Chemistry
Background:
- Thermal transport properties are crucial for materials performance.
- Halide solid solutions present complex thermal behavior.
- Experimental data for (Na,K)Cl solid solutions exist.
Purpose of the Study:
- To analyze the predictive capability of equilibrium molecular dynamics (EMD) simulations for thermal transport in (Na,K)Cl solid solutions.
- To compare EMD simulation results with experimental data.
- To understand the composition dependence of thermal properties.
Main Methods:
- Equilibrium molecular dynamics (EMD) simulations using Green-Kubo theory.
- Simulations performed in NPT and NVT statistical ensembles.
- Comparison with experimental measurements (laser flash technique) and theoretical models (Klemens-Callaway).
Main Results:
- EMD simulations successfully predict the composition dependence of thermal conductivity and diffusivity.
- Good agreement was found between simulated and experimental thermal transport values.
- Phonon scattering due to mass and strain fluctuations explains conductivity degradation.
Conclusions:
- EMD simulations are a reliable tool for predicting thermal transport in halide solid solutions.
- The study provides a detailed analysis of EMD simulation accuracy.
- Findings contribute to understanding and designing materials with tailored thermal properties.
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