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Equilibrium in GeI4–S(Se) systems

A. P. VELMUZHOV1,* , A. A. SIBIRKIN2, V. S. SHIRYAEV1, M. F. CHURBANOV1

Affiliation

  1. G.G. Devyatykh Institute of Chemistry of High-Purity Substances of RAS, 49 Tropinina Str., Nizhny Novgorod, 603950, Russia
  2. N.I. Lobachevski Nizhny Novgorod State University, 23 prosp. Gagarina, 603950, Russia

Abstract

Saturation vapor pressure in GeI4–S system is measured in 150-300 ºС temperature range by tensiometric method using membrane null-manometer. Thermodynamic analysis of heterogeneous chemical equilibriums of GeI4 – S system in 200–500ºС range is carried out by the method of equilibrium constants. The degree of conversion of germanium (IV) iodide into germanium disulfide and germanium diselenide at temperature of 500ºС is shown to do not excess 27 and 11 % respectively. The samples of Ge–S(Se)–I glass system were prepared by interaction of germanium tetraiodide and chalcogen melt in the apparatus equipped with mass-transfer section, it allowed to increase an yield of germanium chalcogenides up to 80–90%..

Keywords

Germanium tetraiodide, Sulfur, Selenium, Thermodynamic equilibrium, Chalcoiodide glasses.

Submitted at: Sept. 9, 2011
Accepted at: Nov. 23, 2011

Citation

A. P. VELMUZHOV, A. A. SIBIRKIN, V. S. SHIRYAEV, M. F. CHURBANOV, Equilibrium in GeI4–S(Se) systems, Journal of Optoelectronics and Advanced Materials Vol. 13, Iss. 11-12, pp. 1437-1441 (2011)