Equation of State of Liquid Carbon Dioxide.

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  • Liu Fusheng
    The Institute of Applied Physics, Sichuan Union University Lab. for Shock Wave and Detonation Physics Research, Southwest Institute of Fluid Physics
  • Chen Xianmeng
    The Institute of Applied Physics, Sichuan Union University
  • Chen Pansen
    Lab. for Shock Wave and Detonation Physics Research, Southwest Institute of Fluid Physics
  • Sun Yue
    The Institute of Applied Physics, Sichuan Union University
  • Zhou Xuefeng
    The Institute of Applied Physics, Sichuan Union University
  • Zhang Qingfu
    The Institute of Applied Physics, Sichuan Union University
  • Jing Fuqian
    Lab. for Shock Wave and Detonation Physics Research, Southwest Institute of Fluid Physics

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  • Equation of State of Liquid Carbon Diox

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Abstract

In this paper, the Hugoniot equation of state of liquid carbon dioxide (CO2) is studied by use of a two-stage light-gas gun. Six new data, ranged from 20-60GPa, are obtained. When these data points, together with those of Schottare plotted in Us-Up plane, it is shown that the slope of the Us-Up curve deceases at Up=3. 5 km/s, which corresponds to a distinguishable volume softening above about 25 GPa on the P-V curve. The statistical-mechanics theory including the chemical equilibrium is applied to explain this softening phenomena.

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