1991
DOI: 10.1063/1.461665
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Equation of state of shock-compressed liquids: Carbon dioxide and air

Abstract: Equation-of-state data were measured for liquid carbon dioxide and air shock-compressed to pressures in the range 28-71 GPa (280-710 kbar) using a two-stage light-gas gun. The experimental methods are described. The data indicate that shock-compressed liquid CO, decomposes at pressures above 34 GPa. Liquid air dissociates above a comparable shock pressure, as does liquid nitrogen. Theoretical intermolecular potentials are derived for CO, from the data. The calculated shock temperature for the onset of CO, deco… Show more

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Cited by 60 publications
(51 citation statements)
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“…Solid specimens were reported to be stable until the formation of acarbonia (an amorphous extended phase), which can only be revealed around 50 GPa at elevated temperature or above 65 GPa at ambient temperature [11]. Here, we concentrate on liquid specimens, which were first single shocked to 29 GPa and double-shocked to 56 GPa by Schott [12], then single shocked to 71 GPa by Nellis et al [13] using a two-stage light-gas gun. Theoretically, intermolecular potential method was applied to study the EOS of CO 2 under dynamic compressions, where the onset of decomposition was reported to be around 30 GPa (4500 K, 17 cm 3 /mol) along the Hugoniot [13].…”
Section: Introductionmentioning
confidence: 99%
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“…Solid specimens were reported to be stable until the formation of acarbonia (an amorphous extended phase), which can only be revealed around 50 GPa at elevated temperature or above 65 GPa at ambient temperature [11]. Here, we concentrate on liquid specimens, which were first single shocked to 29 GPa and double-shocked to 56 GPa by Schott [12], then single shocked to 71 GPa by Nellis et al [13] using a two-stage light-gas gun. Theoretically, intermolecular potential method was applied to study the EOS of CO 2 under dynamic compressions, where the onset of decomposition was reported to be around 30 GPa (4500 K, 17 cm 3 /mol) along the Hugoniot [13].…”
Section: Introductionmentioning
confidence: 99%
“…Here, we concentrate on liquid specimens, which were first single shocked to 29 GPa and double-shocked to 56 GPa by Schott [12], then single shocked to 71 GPa by Nellis et al [13] using a two-stage light-gas gun. Theoretically, intermolecular potential method was applied to study the EOS of CO 2 under dynamic compressions, where the onset of decomposition was reported to be around 30 GPa (4500 K, 17 cm 3 /mol) along the Hugoniot [13]. Despite that the predicted EOS were in accord with experimental data, the electronic structure, which has been proved to be important in determining the dynamical, electrical, and optical properties of molecular fluids under extreme conditions [14][15][16], is still lacking due to the intrinsic approximations of this method.…”
Section: Introductionmentioning
confidence: 99%
“…The latter determined the Hugoniot curve from about 10 to 540 GPa and reshocked states up to ∼830 GPa. An inflection of the Hugoniot curve was observed at ∼34 GPa, ∼3600 K and ascribed to the onset of molecular dissociation [19]. Ab initio molecular dynamics (AIMD) simulations [20,21] support the dissociation of CO 2 along the Hugoniot above ∼30 GPa, but the nature of the dissociated liquid is debated: While Root * datchi@impmc.upmc.fr et al [20] reported that CO 2 decomposes into atomic C and O, Boates et al [21] found the presence of short-lived molecular species among which are CO, O 2 , and C 2 O 4 .…”
Section: Introductionmentioning
confidence: 99%
“…Line (4) is the Hugoniot curve according to Refs. [18][19][20]. The temperatures of the Hugoniot have not been measured, hence we quote those determined from the ab initio calculations of Ref.…”
Section: Introductionmentioning
confidence: 99%
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