Heat contents of the Ga-P, In-P, Ga-As and In-As systems were measured by a drop-calorimeter in the respective concentration ranges of Xp = 0.02 to 0.1, Xp = 0.05 to 0.5, XAs = 0.05 to 0.5 and XAs = 0.05 to 0.5, and 1n the temperature ranges of 800 to 1550K. The enthalpies of fusion for InP, GaAs and InAs were determined as 44.09 ± 0.09, 53.36 ± 0.10 and 37.92 ± 0.14kJ g-atom-, respectively, at the corresponding melting points of 1340 ± 1, 1514 ± 1 and 1221 ± 1K. A thermodynamic analysis method was applied to calculate thermodynamic quantities such as the Gibbs free energies of mixing in the liquid Ga-P, In-P, Ga-As and In-As systems. An optimization of experimental data for these systems were carried out, and the coefficients for the excess Gibbs free energies of mixing for the liquid phase were derived in this study.
ASJC Scopus subject areas
- Condensed Matter Physics
- Physical and Theoretical Chemistry