THE LIQUID TEMPERATURE RANGE, DENSITY, AND CRITICAL CONSTANTS OF MAGNESIUM<sup>1</sup>

McGonigal, P. J.; Kirshenbaum, A. D.; Grosse, A. V.

doi:10.1021/j100810a038

Cited by 63 publications

(14 citation statements)

References 2 publications

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“…The melting heat of Mg is ΔH 0 = 8.5 kJ mol -1 , 30 and liquid density at melting temperature and ambient pressure of ρ m = 1.590(1) g cm -3 with linear negative thermal coefficient -dρ m /dT = 2.647×10 -4 g cm -3 K -1 up to boiling temperature at 1390 K. 31 The room-temperature density at ambient pressure of solid Mg is ρ 0 =1.737 g cm -3 , which gives the density estimation of 1.639 g cm -3 at melting point (923 K) according to our EoS. The value of melting volume is thus ΔV 0 = + 0.456(9) cm 3 mol -1 , and the estimate for the melting curve slope is dT/dp = 47(2) K GPa -1 , which is in satisfactory agreement (22 % accuracy) with observed value of 60 K GPa -1 .…”

Section: Methodsmentioning

confidence: 97%

Thermoelastic equation of state and melting of Mg metal at high pressure and high temperature

Courac

Godec

Solozhenko³

et al. 2020

Journal of Applied Physics

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The p-V-T equation of state of magnesium metal has been measured up to 20 GPa and 1500 K using both multianvil and opposite anvil techniques combined with synchrotron X-ray diffraction. To fit the experimental data, the model of Anderson-Grüneisen has been used with fixed parameter δ T . The 300-K bulk modulus of B 0 = 32.5(1) GPa and its first pressure derivative, B 0 ' = 3.73(2), have been obtained by fitting available data up to 20 GPa to Murnaghan equation of state. Thermal expansion at ambient pressure has been described using second order polynomial with coefficients a = 25(2)×10 -6 K -1 and b = 9.4(4)×10 -9 K -2 . The parameter describing simultaneous pressure and temperature impact on thermal expansion coefficient (and, therefore, volume) is δ T = 1.5(5). The good agreement between fitted and experimental isobars has been achieved to relative volumes of 0.75. The Mg melting observed by X-ray diffraction and in situ electrical resistivity measurements confirms previous results and additionally confirms the p-T estimations in the vicinity of melting.

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Section: Methodsmentioning

confidence: 97%

Thermoelastic equation of state and melting of Mg metal at high pressure and high temperature

Courac

Godec

Solozhenko³

et al. 2020

Journal of Applied Physics

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“…Here, γ Mg was known from the literature as [39] γ Mg = 721 − 0.149T (7) where ρ was also known from the literature [40] ρ = 1.834 − 2.647 × 10 −4 T (8)…”

Section: Effects Of Temperature On Mg Vapor Nucleationmentioning

confidence: 99%

Nucleation and Condensation of Magnesium Vapor in Argon Carrier

Han

Guo

et al. 2020

Metals

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The nucleation and condensation of Magnesium (Mg) vapor carried by argon gas (Ar) were examined. The condensation of Mg vapor at a heat source temperature of 1273–1473 K and Ar flow rate of 0.1–0.4 m3/h was analyzed. The result indicated that the condensation temperature is affected by the heat source temperature and Ar flow rate, and the condensation temperature of Mg vapor was 1013.3 K at a heat source temperature of 1473 K and Ar flow rate of 0.2 m3/h. The effects of Mg vapor partial pressure and temperature of the condensation zone on the nucleation and condensation of Mg vapor carried by Ar were calculated and analyzed in terms of atomic collisions and critical nucleation radius. Increased vapor oversaturation and decreased condensation temperature were favorable for liquid nucleation growth. The Mg condensation products in Ar flow rate of 0.2 m3/h at a heat source temperature of 1473 K were analyzed by XRD, SEM, and EDS, which indicated that the condensed product was of high purity and not easily oxidized in Ar flow. In this paper, the quality of Mg vapor condensation was controlled, which provided the theoretical and experimental basis for a continuous Mg production process.

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“…The linear-like behavior of isobars of a liquid as well as their coincidence with the binodal at low temperatures was described many years ago. That is why it was used to estimate the critical point coordinates. − (Below, the values with subscript “c” refer to the critical point.) However, in reality, only the Zeno-line is straight (at least in liquid phase).…”

Section: The Zeno-line Similaritiesmentioning

confidence: 99%

“…For nonmetallic substances, T c is 2–3 times smaller than T *, as the measurements show. Supposing that this ratio keeps its value for metals as well, one can estimate T c (see, for instance, ref ). Thus, the slope of corresponding isobars plays a crucial role in this approach, as it directly defines T *.…”

Section: The Zeno-line For Metalsmentioning

confidence: 99%

The Zeno Line for Al, Cu, and U

Apfelbaum

Воробьев

2016

J. Phys. Chem. B

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We show that the property of linearity for a line of unit compressibility factor (Zeno line) can be confirmed for metals (Al, Cu, and U) in liquid phase. The embedded atom potentials (EAM) have been used to describe the interaction between the particles. The numerical simulations within Monte Carlo (MC) technique with the EAM potential have resulted in the straight Zeno-line for considered metals and have allowed us to define the Zeno line parameters. The similarity relations between the critical and the Zeno line parameters, which were observed previously for nonmetallic substances, have appeared to be valid for Al and Cu as well. For uranium there is a contradiction between the calculated and experimental data, indicating the limitation for these similarities.

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THE LIQUID TEMPERATURE RANGE, DENSITY, AND CRITICAL CONSTANTS OF MAGNESIUM¹

Cited by 63 publications

References 2 publications

Thermoelastic equation of state and melting of Mg metal at high pressure and high temperature

Thermoelastic equation of state and melting of Mg metal at high pressure and high temperature

Nucleation and Condensation of Magnesium Vapor in Argon Carrier

The Zeno Line for Al, Cu, and U

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THE LIQUID TEMPERATURE RANGE, DENSITY, AND CRITICAL CONSTANTS OF MAGNESIUM1

Cited by 63 publications

References 2 publications

Thermoelastic equation of state and melting of Mg metal at high pressure and high temperature

Thermoelastic equation of state and melting of Mg metal at high pressure and high temperature

Nucleation and Condensation of Magnesium Vapor in Argon Carrier

The Zeno Line for Al, Cu, and U

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Product

Resources

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THE LIQUID TEMPERATURE RANGE, DENSITY, AND CRITICAL CONSTANTS OF MAGNESIUM¹