globalchange  > 气候减缓与适应
DOI: 10.1029/2012GL054347
论文题名:
High pressure and temperature electrical resistivity of iron and implications for planetary cores
作者: Deng L.; Seagle C.; Fei Y.; Shahar A.
刊名: Geophysical Research Letters
ISSN: 0094-9417
EISSN: 1944-9148
出版年: 2013
卷: 40, 期:1
起始页码: 33
结束页码: 37
语种: 英语
Scopus关键词: Electrical resistivity ; Electrical resistivity measurements ; High-pressure and temperatures ; High-pressure condition ; Increasing temperatures ; Polycrystalline iron ; Pressure and temperature ; Temperature dependence ; Electric conductivity of solids ; Heat flux ; Iron ; Thermal conductivity of solids ; adiabatic process ; electrical resistivity ; heat flux ; high pressure ; high temperature ; iron ; Mercury (planet) ; planetary landform ; thermal conductivity
英文摘要: Electrical resistivity measurements of polycrystalline iron have been performed at 5, 7, and 15 GPa and in the temperature range 293-2200K by employing a four-wired method. The kinks in electrical resistivity associated with solid iron phase transitions and the solid to liquid transition were clearly observed upon increasing temperature. Geometry corrections due to volume variations with pressure and temperature were applied to the entire data set. High pressure and temperature thermal conductivity were calculated by fitting resistivity data through the Wiedemann-Franz law. The temperature dependences of electrical resistivity and thermal conductivity for α, γ, and ε solid iron have been determined at high-pressure conditions. Our study provides the first experimental constraint on the heat flux conducted at Mercury's outmost core, estimated to be 0.29-0.36TW, assuming an adiabatic core. Extrapolations of our data to Martian outer core conditions yield a series of heat transport parameters (e.g., electrical resistivity, thermal conductivity, and heat flux), which are in reasonable comparison with various geophysical estimates. © 2013. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84874880381&doi=10.1029%2f2012GL054347&partnerID=40&md5=17b5847d1644452e5e7d419abf51372b
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6681
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作者单位: Geophysical Laboratory, Carnegie Institution of Washington, Washington, DC, United States

Recommended Citation:
Deng L.,Seagle C.,Fei Y.,et al. High pressure and temperature electrical resistivity of iron and implications for planetary cores[J]. Geophysical Research Letters,2013-01-01,40(1).
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