Thermal conductivity of platinum and periclase under extreme conditions of pressure and temperature
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2023-01-02 |
| Journal | High Pressure Research |
| Authors | Akira Hasegawa, Kenji Ohta, Takashi Yagi, Kei Hirose |
| Institutions | Tokyo Institute of Technology, Life Science Institute |
| Citations | 11 |
Abstract
Section titled āAbstractāWe have measured the thermal diffusivity and conductivity of platinum and MgO periclase at high pressures (P) and high temperatures (T) by combining the pulsed light heating thermoreflectance technique with a laser-heated diamond anvil cell. The obtained thermal conductivity of platinum shows positive pressure and temperature dependences, reaching about 210 W/m/K at the highest P-T condition of 125 GPa and 1850 K. The thermal conductivity of periclase was determined up to 140 GPa and 1950 K, corresponding to the Earthās lowermost mantle, where the conductivity was about 90 W/m/K. Our measurements allow us to test models for the combined P-T dependence of the thermal conductivity of both metals and insulating materials up to Mbar pressures and thousands of kelvins.