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

Katsunori Yamaguchi, Kimio Itagaki, Akira Yazawa

Research output: Contribution to journalArticle

3 Citations (Scopus)

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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drop calorimeters
Calorimeters
Partial pressure
Phosphorus
Thermodynamics
deviation
thermodynamics
Raoult law
Liquids
liquids
Free energy
Enthalpy
Thermodynamic properties
Gases
partial pressure
phosphorus
Temperature
Chemical analysis
enthalpy
free energy

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Thermodynamic investigation of liquid In-P and Ga-P systems by the use of a drop-calorimeter. / Yamaguchi, Katsunori; Itagaki, Kimio; Yazawa, Akira.

In: Nippon Kinzoku Gakkai-si, Vol. 53, No. 11, 11.1989, p. 1140-1147.

Research output: Contribution to journalArticle

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