Thermodynamic investigation of liquid In-P and Ga-P systems by the use of a drop-calorimeter

Katsunori Yamaguchi, Kimio Itagaki, Akira Yazawa

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Abstract

Heat contents of the In-P and Ga-P systems were measured in the concentration range of NP=0.05 to 0.50 (InP) and NP=0.02 to 0.10, at 800 to 1450 K and 800 to 1550 K. A thermodynamic analysis method was applied to calculate thermodynamic quantities such as the activities of related components and the free energies of mixing. The activity of In in the liquid In-P system at 1473 K showed a negative deviation and a slight positive deviation from Raoult's law in the compound side and in the In-rich region, respectively, while the activity of P showed a large negative deviation. The activity of Ga in the liquid Ga-P system at 1573 K showed a slight positive deviation from Raoult's law, and that of P showed a large negative deviation. Total pressure- or partial pressure-temperature-composition correlation diagrams were constructed. Total pressure of phosphorus gas species and partial pressure of P2 showed a drastic increase with increasing temperature and increasing phosphorus concentration.

Original languageEnglish
Pages (from-to)1140-1147
Number of pages8
JournalNippon Kinzoku Gakkai-si
Volume53
Issue number11
Publication statusPublished - 1989 Nov
Externally publishedYes

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ASJC Scopus subject areas

  • Engineering(all)

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