Solidus Isotherms and Isoconcentration Lines in the System Ga‐In‐Sb

Gratton, Michel; Woolley, J. C.

doi:10.1149/1.2131519

Cited by 13 publications

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“…The cusp point has therefore been determined as the point of intersection of the GaSb-rich three-phase boundary and the appropriate liquidus isothermal curve. As was shown previously (1,8), the simple solution model gives good agreement with experiment when used to calculate liquidus isotherms in these ternary systems. Thus, this model has been used here to calculate the appropriate liquidus isotherms, as is discussed further below.…”

Section: Experimental Methods and Resultssupporting

confidence: 79%

“…The other interaction parameters required for the analysis are ~As-sb and ~GaAs-GaSb. AS in the case of the Ga-In-Sb diagram (8), values of these parameters have been determined here as a function of temperature by simultaneous solution of the experimental values for points on the liquidus and solidus curves of the pseudobinary section. Again, these ~ values were least squares fitted to a linear temperature variation and the resulting forms for aAs.Sb and O:GaAs.GaSb are shown in Table II.…”

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confidence: 99%

“…More recently, Nahory et al(5) have made an analysis based on the simple solution model, but treating the aAs-Sb interaction parameter as composition dependent rather than making the usual assumption of linear temperature dependence. Here, the simple solution model has been used to predict values for comparison with the various data determined experimentally.The theory used for the simple solution model Was summarized in a previous work on the Ga-In-Sb diagram(8) and the final equations necessary for the calculations are repeated here.…”

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Investigation of Two‐ and Three‐Phase Fields in the Ga‐As‐Sb System

Gratton

Woolley

1980

J. Electrochem. Soc.

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The technique of annealing samples at a temperature at which both liquid and solid phases occur, followed by quenching to freeze‐in the solid phase, has been used to investigate equilibrium conditions off the pseudobinary section. It has been found that large three‐phase liquid‐solid‐solid fields occur corresponding to the two‐phase solid‐solid field of the pseudobinary section. The tie‐lines of the various two‐phase liquid‐solid fields have been determined together with the boundaries of the three‐phase fields at various temperatures in the range 600°–730°C. The locus of the cusp in the liquidus sheet corresponding to the liquidus point of the three‐phase field has also been found. Finally, the two solid phases of the three‐phase fields give the ranges of immiscibility in the pseudobinary section GaAsySb1−y , and hence the variation of the miscibility gap with temperature has been determined. This gap is found to be very asymmetric even at temperatures a little below the peritectic horizontal, the solubility limits at 700°C being y=0.30 normaland 0.95 . The results are compared with the predictions of the simple solution model which give reasonable agreement with the liquidus data but poor agreement with the miscibility gap values.

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Section: Experimental Methods and Resultssupporting

confidence: 79%

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confidence: 99%

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confidence: 99%

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