How far away are accurate equations of state determinations? Some issues on pressure scales and non-hydrostaticity in diamond anvil cells

Liu Lei; Bi Yan

doi:10.1016/j.mre.2016.06.002

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Jul. 2016

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Liu Lei, Bi Yan. How far away are accurate equations of state determinations? Some issues on pressure scales and non-hydrostaticity in diamond anvil cells[J]. Matter and Radiation at Extremes, 2016, 1(4). doi: 10.1016/j.mre.2016.06.002

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Liu Lei, Bi Yan. How far away are accurate equations of state determinations? Some issues on pressure scales and non-hydrostaticity in diamond anvil cells[J]. Matter and Radiation at Extremes, 2016, 1(4). doi: 10.1016/j.mre.2016.06.002

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How far away are accurate equations of state determinations? Some issues on pressure scales and non-hydrostaticity in diamond anvil cells

doi: 10.1016/j.mre.2016.06.002

Liu Lei^{1, 2},
Bi Yan^{1
,
,}

1.
aNational Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, China Academy of Engineering, Mianyang, 621900, China
2.
bDepartment of Earth Science, Uppsala University, Uppsala, SE, 75236, Sweden

More Information

Corresponding author: *Corresponding author. E-mail address: biyan@hpstar.ac.cn (Y. Bi).
Received Date: 2016-03-29
Accepted Date: 2016-05-27
Publish Date: 2016-07-15

Abstract

Abstract

The equations of state (EOSs) of materials are the cornerstone of condensed matter physics, material science, and geophysics. However, acquiring an accurate EOS in diamond anvil cell (DAC) experiments continues to prove problematic because the current lack of an accurate pressure scale with clarified sources of uncertainty makes it difficult to determine a precise pressure value at high pressure, and non-hydrostaticity affects both the volume and pressure determination. This study will discuss the advantages and drawbacks of various pressure scales, and propose an absolute pressure scale and correction methods for the effects of non-hydrostaticity. At the end of this paper, we analyze the accuracy of the determined EOS in the DAC experiments we can achieve to date.
- Equation of state,
- Pressure scale,
- Nonhydrostaticity effect,
- Diamond anvil cell

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References(102)

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