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

Lei Liu | Zendy; Yan Bi | Zendy

Open Access

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

Author(s) -

Lei Liu,

Yan Bi

Publication year - 2016

Publication title -

matter and radiation at extremes

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.006

H-Index - 18

eISSN - 2468-2047

pISSN - 2468-080X

DOI - 10.1016/j.mre.2016.06.002

Subject(s) - diamond anvil cell , scale (ratio) , diamond , equation of state , volume (thermodynamics) , cornerstone , state (computer science) , statistical physics , value (mathematics) , current (fluid) , high pressure , mechanics , thermodynamics , mechanical engineering , physics , computer science , materials science , mathematics , engineering , algorithm , metallurgy , statistics , quantum mechanics , art , visual arts

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

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