Measurement of vapor pressure of indium over α ag-ln using atomic absorption

Masson, D. Bruce; Pradhan, Shrikant S.

doi:10.1007/bf02645600

Cited by 24 publications

(7 citation statements)

References 9 publications

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“…Fig. 10 Calculated activity of In in the liquid phase in the temperature range of 727 to 1027°C compared with experimental data [48,50,51,[54][55][56]59] In / at. % Fig.…”

Section: Methodsmentioning

confidence: 99%

“…10 together with the experimental data discussed above. [48,50,51,[54][55][56]59] The calculated enthalpies of formation of the solid phases at 25°C are shown in Fig. 11 along with the experimental data of Kleppa [49] and Orr and Hultgren.…”

Section: 21mentioning

confidence: 96%

“…The heat of formation of the fcc phase at 44°C was measured by Orr and Hultgren [58] by means of calorimetric measurements method. The activity of In in the fcc phase at 727°C was measured by Masson and Pradhan [59] with vapor pressure measurement method.…”

Section: The Ag-in Systemmentioning

confidence: 99%

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Thermodynamic and Experimental Study of the Mg-Sn-Ag-In Quaternary System

Wang

Hudon

Kevorkov

et al. 2014

J. Phase Equilib. Diffus.

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Phase equilibria in the Mg-rich region of the Mg-Sn-Ag ternary system were determined by quenching experiments, differential scanning calorimetry, electron probe micro-analysis, and Xray diffraction techniques. No ternary compounds were found in the studied isothermal sections. A critical evaluation of the available experimental data and a thermodynamic optimization of the Mg-Sn-Ag-In quaternary system were carried out using the calculation of phase diagrams method. The modified quasichemical model in the pair approximation was used for the liquid solution, which exhibits a high degree of short-range order. The solid phases were modeled with the compound energy formalism. All available and reliable experimental data were reproduced within experimental error limits. A self-consistent thermodynamic database was constructed for the Mg-Sn-Ag-In quaternary system, which can be used as a guide for Mg-based alloys development.

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“…Fig. 10 Calculated activity of In in the liquid phase in the temperature range of 727 to 1027°C compared with experimental data [48,50,51,[54][55][56]59] In / at. % Fig.…”

Section: Methodsmentioning

confidence: 99%

Section: 21mentioning

confidence: 96%

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Thermodynamic and Experimental Study of the Mg-Sn-Ag-In Quaternary System

Wang

Hudon

Kevorkov

et al. 2014

J. Phase Equilib. Diffus.

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“…For the (Ag) phase, there is activity data of In at 1000K 19 and at 900K. 20 Enthalpies of formation for the (Ag) and ζ phases have also been reported.…”

Section: The Ag-in Systemmentioning

confidence: 96%

Thermodynamics of the Sn-In-Ag solder system

Korhonen¹,

Kivilahti²

1998

Journal of Elec Materi

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“…The sharp line spectra of hollow cathode lamps have already been used in a similar fashion to measure the partial pressure of a monatomic species in the 10 -lo to 10 -6 atm range for Zn (7,8), In (9), and Cd (10) over metallic alloys.…”

mentioning

confidence: 99%

Gibbs Energy of Formation and Partial Pressure of Hg over Te‐Saturated HgTe ( c ) Between 385 and 724 K

Sha

Chen

Fang

et al. 1989

J. Electrochem. Soc.

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The partial pressure of Hg over Te-saturated HgTe(c) has been determined between 385 K, where it is 1.0 • 10 -8 atm, and 724 K, where it is 3 • 10 -2 atm, by measuring the optical absorbance at 253.7 nm of the vapor phase. The data below the 686 K eutectic with Te(c) are used to calculate the standard Gibbs energy of formation and to obtain hH~ = -43,279 -+ 1,146 J/mol and hS~ = -20.510 _+ 2.452 J/mol degree K. Published data for the partial pressures of rig and Te2 between 770 and 943 K are reanalyzed to give the standard Gibbs energy, and hH~ = -43,802 _+ 2,761, and AS~ = -20.560 -+ 3.13. The two sets of values agree within the 95% confidence level uncertainties given. However, the standard enthalpy of formation at 298 K differs significantly from the accepted value.The partial pressures of Hg and Te2, PHg and P2, respectively, have been measured over both Hg-saturated and Te-saturated HgTe(c) between 773 and 943 K (1), and over Te-saturated HgTe(c) in the same temperature range (2). In the former study, the standard Gibbs energy of formation from. Hg(g) and Te2(g) was calculated, assuming an ideal vapor phase. In the latter, the Gibbs energy of formation from Hg(1) and Te(1) was calculated, assuming Hg(g) was non-ideal. In his critical compilation, Mills (3) used the data in Ref.(1) to obtain All~ = -39.5 kJ/mol. Low-temperature heat capacity measurements on Hg, Te, and HgTe give hS~ = -16.90 -+-2.09 J/mol-degree. On the other hand, the Gibbs energy of formation determined from EMF measurements between 310 and 430 K (4) gave hH~ = -33.890 -+ 1.67 kJ/mol and AS~ = -19.246 -+ 2.92 J/moldegree. Mills (3) used a third law analysis with this data to obtain hH~ = -31.80 k J/mole, which he selected as the best value.In order to determine AH~ more closely, we have measured P~ over Te-saturated HgTe below the 686 K HgTe-Te eutectic (5) so that, the phase coexisting with HgTe being essentially pure Te, one can calculate the standard Gibbs energy of formation of HgTe(c) from PHg and the vapor pressure of Hg at the same temperature. In addition, we make use of a recent (6) third law analysis of the crystalliquid-vapor equilibrium for tellurium to recalculate the Gibbs energies from the high-temperature data (1, 2) and to obtain AH~ and hS~ for comparison with the values obtained from the low-temperature Gibbs energies reported here. We find that the high-temperature data give hH~ = -43.802 _+ 2.76 kJ/mol and hS~ = -20.560 _+ 3.13 J/mol degree, where the uncertainties are at the 95% confidence level. Our low-temperature data gives values agreeing within these uncertainties. Thus AH~ does not agree well with the value from the EMF measurements (4), whereas hS~ does agree within experimental error with the results from both the EMF measurements and the lowtemperature heat capacities.The technique used to determine PHg as lOW as 10 -8 atm is to measure the optical alSsorbance at 253.7 nm of the vapor phase using a Hg hollow cathode lamp as a light source, as in atomic absorption. The sharp line spectra of hollow cathode lamps...

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Measurement of vapor pressure of indium over α ag-ln using atomic absorption

Cited by 24 publications

References 9 publications

Thermodynamic and Experimental Study of the Mg-Sn-Ag-In Quaternary System

Thermodynamic and Experimental Study of the Mg-Sn-Ag-In Quaternary System

Thermodynamics of the Sn-In-Ag solder system

Gibbs Energy of Formation and Partial Pressure of Hg over Te‐Saturated HgTe ( c ) Between 385 and 724 K

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