Activities in the Ca-Si system

Wynnyckyj, J. R.; Pidgeon, L. M.

doi:10.1007/bf02664227

Cited by 19 publications

(19 citation statements)

References 6 publications

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“…The liquidus temperature for three alloys between the Ca 2 Si and CaSi phases was measured by [9]. He found higher liquidus temperatures than those of [7] and thus confirmed the phase diagram reported by [6]. The binary phase diagram by Calphad method was calculated by [5] using the data of [6].…”

Section: Phase Diagram Datamentioning

confidence: 66%

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Experimental study of ternary Ca–Mg–Si phase equilibria and thermodynamic assessment of Ca–Si and Ca–Mg–Si systems

2003

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Section: Phase Diagram Datamentioning

confidence: 66%

“…From vapor, pressure measurements [7] determined liquidus temperatures which are lower than those reported by [6]. A fourth binary phase with the composition Ca 3 Si 4 was established by [8].…”

Section: Phase Diagram Datamentioning

confidence: 99%

Experimental study of ternary Ca–Mg–Si phase equilibria and thermodynamic assessment of Ca–Si and Ca–Mg–Si systems

2003

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“…Activities of Si-Ca melts have been established by Wynnyckyj and Pidgeon [15] and Schurmann et al [16] through the measurement of the calcium pressure over Si-Ca melts. They measured the activity of calcium and calculated the activity of Si by Gibbs-Duhem equation.…”

Section: Si-ca Alloysmentioning

confidence: 99%

Thermodynamic activities in silicon binary melts

2012

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The thermodynamic activities in the silicon binary melts with Al, Ca, Mg, Fe, Ti, Zn, Cu, Ag, Au, Sn, Pb, Bi, Sb, Ga, In, Pt, Ni, Mn and Rh are studied. The silicon activities along the liquidus are calculated through a quasi-regular solution model using the recently determined liquidus constants for the silicon binary systems. The silicon activities at its melting point are calculated considering regular solution approximation. The activities of the other melt component at the silicon melting point are also calculated through the graphical integration of the GibbsDuhem equation for the activity coefficient, which are further utilized to determine the corresponding activities along the liquidus. The calculated activities are presented graphically, and it is indicated that the results are consistent with the reported activity data in the literature. The activities in the dilute solutions are also calculated graphically. Moreover, the activities of particular dilute solute elements in silicon are calculated through a simple formula, which is a function of the liquidus constants.

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“…[22] The liquidus at higher silicon concentrations than eutectic has been determined through measuring the total pressure over the Si-Ca liquids at different temperatures, [21] thermal analysis, and electrical conductivity, [22] using direct weighting Knudsen cell. [23] The data of Tamaru [24] are not considered here because the raw materials used contained large amounts of impurities.…”

Section: ½10mentioning

confidence: 99%

“…The calculated a-T plot using literature liquidus data [21][22][23] is shown in Figure 1; this plot gives liquidus constants a = -83,820 J/mol and b = -0.23 J/mol-K.…”

Section: ½10mentioning

confidence: 99%

Liquidus of Silicon Binary Systems

Safarian

Kolbeinsen

Tangstad

2011

Metall Mater Trans B

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Thermodynamic knowledge about liquid silicon is crucial for the production of solar-grade silicon feedstock from molten silicon. In the current study, liquidus for silicon binary alloys is formulated using a previously developed method in which the liquidus curve is calculated using two constants. The liquidus measurements for the silicon portion of the silicon alloys with Al, Ca, Mg, Fe, Ti, Zn, Cu, Ag, Au, Pt, Sn, Pb, Bi, Sb, Ga, In, Ni, Pd, Mn, and Rh are reviewed, and the consistent data were used to determine the liquidus constants. The liquidus curves for silicon binary systems are calculated and plotted. It is indicated that the calculated liquidus curves fit well with the experimental data. A correlation between the determined liquidus constants is also observed, which can be used to gain a better understanding of the thermodynamics of the silicon binary melts.

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Activities in the Ca-Si system

Cited by 19 publications

References 6 publications

Experimental study of ternary Ca–Mg–Si phase equilibria and thermodynamic assessment of Ca–Si and Ca–Mg–Si systems

Experimental study of ternary Ca–Mg–Si phase equilibria and thermodynamic assessment of Ca–Si and Ca–Mg–Si systems

Thermodynamic activities in silicon binary melts

Liquidus of Silicon Binary Systems

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