| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Thermal Transport in Crystalline and Non-crystalline Solids: Theory and Experiments
|
| Presentation Title |
Lattice Thermal Conductivity of Quartz at High Pressure and Temperature from the Boltzmann Transport Equation |
| Author(s) |
Xue Xiong, Eugene Ragasa, Aleksandr Chernatynskiy, DaWei Tang, Simon R. Phillpot |
| On-Site Speaker (Planned) |
Simon R. Phillpot |
| Abstract Scope |
Knowledge of thermal conductivities of materials in the Earth’s crust, and mantle and their dependence on temperature and pressure, is required for quantitative calculations in geology and geophysics problems. As it is more than 60 mass% of the crust and ~45 mass% of the mantle, silica is a prototype material in which to consider the combined effects of temperature and pressure. The thermal conductivities along the basal and hexagonal directions of α-quartz silica, the low-temperature form of crystalline SiO2, are predicted from the solution of the Boltzmann transport equation combined with a standard empirical potential, with temperature up to 900 K and pressure as high as 4 GPa. The thermal conductivity, influenced by temperature and pressure, is analyzed based on phonon properties, including spectral thermal conductivity, dispersion relation, density of states, lifetime and probability density distribution function. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |