High-pressure thermal conductivity and compressional velocity of NaCl in B1 and B2 phase.

ABSTRACT: Sodium chloride (NaCl) is an important, commonly used pressure medium and pressure calibrant in diamond-anvil cell (DAC) experiments. Its thermal conductivity at high pressure-temperature (P-T) conditions is a critical parameter to model heat conduction and temperature distribution within an NaCl-loaded DAC. Here we couple ultrafast optical pump-probe methods with the DAC to study thermal conductivity and compressional velocity of NaCl in B1 and B2 phase to 66 GPa at room temperature. Using an externally-heated DAC, we further show that thermal conductivity of NaCl-B1 phase follows a typical T^-1 dependence. The high P-T thermal conductivity of NaCl enables us to confirm the validity of Leibfried-Schlömann equation, a commonly used model for the P-T dependence of thermal conducti

SUBMITTER: Hsieh WP 

PROVIDER: S-EPMC8556477 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature