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

Katsunori Yamaguchi, Kimio Itagaki, Akira Yazawa

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Heat contents of the Ga-As and In-As systems were measured by a drop-calorimeter in the concentration ranges of NAs=0.05 to 0.05 (GaAs, InAs) and in the respective temperature ranges of 800 t 1550 K and 700 to 1500 K. The corresponding results are illustrated in (HTH298.15)-temperature-composition ternary diagrams. The activities and heats and entropies of mixing were determined at temperature above 1200 K. The activities of Ga and In in both liquid systems showed a large negative deviation from Raoult's law at the compound side and a slight positive deviation in the Ga-rich and In-rich regions. Those of As showed a large negative deviation from Raoult's law. Based on the obtained thermodynamic data, partial pressure-temperature-composition correlation diagrams were constructed. Total pressure of arsenic gas species and partial pressure of As, showed a drastic increase with increasing temperature and arsenic concentration.

Original languageEnglish
Pages (from-to)966-972
Number of pages7
JournalNippon Kinzoku Gakkai-si
Volume52
Issue number10
Publication statusPublished - 1988 Oct
Externally publishedYes

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drop calorimeters
Calorimeters
Thermodynamics
thermodynamics
Raoult law
Liquids
liquids
Arsenic
deviation
arsenic
Partial pressure
partial pressure
Temperature
diagrams
temperature
Chemical analysis
Enthalpy
Entropy
Thermodynamic properties
Gases

ASJC Scopus subject areas

  • Engineering(all)

Cite this

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

In: Nippon Kinzoku Gakkai-si, Vol. 52, No. 10, 10.1988, p. 966-972.

Research output: Contribution to journalArticle

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