期刊
PHYSICS OF THE EARTH AND PLANETARY INTERIORS
卷 247, 期 -, 页码 17-26出版社
ELSEVIER
DOI: 10.1016/j.pepi.2015.06.002
关键词
Platinum; Iron; Conductivity; Resistance; Resistivity; Thermal; Electrical; Pressure; Temperature; High
资金
- NSF Major Research Instrumentation program [NSF EAR-1015239, NSF EAR/IF-1128867]
- NSF EAR/IF, the Army Research Office [56122-CH-H]
- Carnegie Institution of Washington, the University Of Edinburgh
- British Council Researcher Links Programme
- Division Of Earth Sciences
- Directorate For Geosciences [1128867] Funding Source: National Science Foundation
- Division Of Earth Sciences
- Directorate For Geosciences [1520648] Funding Source: National Science Foundation
The transport properties of matter at high pressure and temperature are critical components in planetary interior models, yet are challenging to measure or predict at relevant conditions. Using a novel flash-heating method for in-situ high-temperature and high-pressure thermal conductivity measurement, we study the transport properties of platinum to 55 GPa and 2300 K. Experimental data reveal a simple high-pressure and high-temperature behavior of the thermal conductivity that is linearly dependent on both pressure and temperature. The corresponding electrical resistivity evaluated through the Wiedemann-Franz-Lorenz law is nearly constant along the melting curve, experimentally confirming the prediction of Stacey for an ideal metal. This study together with prior first-principles predictions of transport properties in Al and Fe at extreme conditions suggests a broad applicability of Stacey's law to diverse metals, supporting a limit on the thermal conductivity of iron at the conditions of Earth's outer core of 90 W/mK or less. (C) 2015 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据