Journal of Physical Studies 4(4), 431–436 (2000) DOI: https://doi.org/10.30970/jps.04.431 PARTIAL PRESSURE DIAGRAMS OF THE In–Se–O AND Ga–Se–O SYSTEMS O. A. Balitskii{1}, N. N. Berchenko{2}, V. P. Savchyn{1} 1Physical Department, Ivan Franko National University of Lviv, 50 Drahomanov Str., Lviv, UA-79005, Ukraine 2Electrophysical Department, State University ‟Lvivska Polytechnica”, 12 Bandera Str., UA-79013, Lviv, Ukraine

The partial pressure diagrams of the In-Se-O and Ga-Se-O systems in the $p_{{\rm O}_2}$ and $p_{{\rm SeO}_2}$ coordinates have been discussed. The mono- and invariant equilibria have been calculated using isothermal Want-Hoff equation. The relationships between the partial pressure diagrams and the condensed phase equilibrium diagrams have been established. It has been shown that the increase of the SeO$_2$ partial pressure leads to the formation of the $A^{\rm III}_2$Se$_3$ compounds and the formation of oxide phases requires relatively high pressures of oxygen.

PACS number(s): 68.55.Nq

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