Ionic Conductivity
of (As₂Se₃)_{1 x}(AgHal)_x (Hal = I, Br) Nanocomposites

V. V. Tomaev*, Yu. S. Tver’yanovich, M. D. Bal’makov, I. A. Zvereva, and A. B. Missyul’

Faculty of Chemistry, St. Petersburg State University, Universitetskii pr. 26, Petrodvorets, St. Petersburg, 198504 Russia

*e-mail: tvaza@mail.ru

Received July 4, 2009

Abstract—Nanocomposites based on chalcogenide glasses have been synthesized. A differential thermal anal-
ysis of (As₂Se₃)_{1 – x}(AgI)_x and (As₂Se₃)_{1 – x}(AgBr)_x (0 x 0.5) samples has been performed. The size of nanof-
ragments that undergo elementary structural transformations has been evaluated. The data obtained are in agree-
ment with the evaluated sizes of X-ray coherent scattering regions. The electrical properties of the glasses under
consideration have been studied using impedance spectroscopy in the temperature range 293–393 K. It has been
demonstrated that the ionic component of the electrical conductivity dominates in glasses with a high content
of silver halide.

Key words: chalcogenide glasses, vitreous state, nanofragments, ionic conductivity, impedance spectroscopy

DOI: 10.1134/S1087659610040097

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