DOI: 10.1002/2014GL060423
论文题名: Measurements of lattice thermal conductivity of MgO to core-mantle boundary pressures
作者: Imada S. ; Ohta K. ; Yagi T. ; Hirose K. ; Yoshida H. ; Nagahara H.
刊名: Geophysical Research Letters
ISSN: 0094-9984
EISSN: 1944-9715
出版年: 2014
卷: 41, 期: 13 起始页码: 4542
结束页码: 4547
语种: 英语
英文关键词: high pressure
; MgO periclase
; thermal conductivity
; thermal diffusivity
Scopus关键词: Crystal lattices
; Grain size and shape
; Magnesia
; Temperature measurement
; Thermal diffusivity
; Core-mantle boundary
; High pressure
; High temperature measurement
; Lattice thermal conductivity
; Lower mantle condition
; Periclase
; Thermal conduction
; Thermoreflectance
; Thermal conductivity
英文摘要: The pressure response of lattice thermal conduction in MgO periclase has been a matter of interest for many decades to estimate the thermal conductivity profile of the lower mantle. Using the pulsed light heating thermoreflectance technique, we measured the lattice thermal diffusivity of MgO at pressures up to 137 GPa at 300 K to determine its lattice thermal conductivity under deep lower mantle conditions. Considering the temperature effect estimated by previous high-temperature measurements, we calculated the lattice part of the thermal conductivity of MgO to be 17.9 ± 1.1 W/m/K at 135 GPa and 3600 K. Additionally, we observed that the lattice conductivity of MgO has little dependence on its grain size under core-mantle boundary conditions. Key Points We measured the lattice thermal diffusivity of MgO up to 137 GPa Thermal conductivity of MgO is estimated to be 17.9 W/m/K at the CMB Lattice conductivity of MgO depends little on grain size at CMB conditions ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84904073867&doi=10.1002%2f2014GL060423&partnerID=40&md5=c8e7ce363fb7e9af20d6b148e2e576f6
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7248
Appears in Collections: 气候减缓与适应
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作者单位: Department of Earth and Planetary Sciences, Tokyo Institute of Technology, Tokyo, Japan
Recommended Citation:
Imada S.,Ohta K.,Yagi T.,et al. Measurements of lattice thermal conductivity of MgO to core-mantle boundary pressures[J]. Geophysical Research Letters,2014-01-01,41(13).