1. 高温高压下铁热导率的第一性原理研究.
- Author
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杨陈, 余柏树, 焦亩鑫, 杨学楠, 胡翠娥, and 曾召益
- Abstract
Thermal conductivities of iron at high pressure and temperature are key parameters to constrain the dynamics and thermal evolution of the Earth’s core. In previous investigations,the thermal conductivity is mainly attributed to the electronic conductivity,we found that the contribution of lattice vibration to thermal conductivity under high pressure cannot be ignored. The phonon dispersion,Hugoniot equation of state and thermal transport properties of iron are calculated with the lattice dynamics and Boltzmann transport theory in this work. The simulation temperature for iron is 3500 K near the core-mantle boundary and 6500 K at Earth’s inner core conditions. The thermal conductivities considering lattice vibration are respectively 112 W/m K near the core-mantle boundary and 200 W/m K at Earth’s inner core conditions. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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