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Glass formation in the GeSe2-Sb2Se3-AgI system

V. VASSILEV1,* , G. VASSILEV1, J. DIKOVA2, K. PETKOV2

Affiliation

  1. Department of Non-Ferrous Metals and Semiconductor Technologies, University of Chemical Technology and Metallurgy, 8 Kl. Ohridski blvd., 1756 Sofia, Bulgaria.
  2. Central Laboratory of Photoprocesses, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., bl. 109, 1113 Sofia, Bulgaria

Abstract

Chalcohalide glasses from the GeSe2-Sb2Se3-AgI system were synthesized for the first time. The glass forming region was determined by the help of visual, XRD and electron microscopic analyses. It lies partially on the GeSe2-Sb2Se3 (0-70 mol % Sb2Se3) and GeSe2-AgI (0-30 mol % AgI) sides. The maximum solubility of AgI in the glasses is ~ 70 mol %. The basic physicochemical parameters such as density (d), microhardness (HV) and temperatures of phase transformations (glass transition Tg, crystallization Tcr and melting Tm) were measured. Compactness and some thermo-mechanical characteristics such as volume (Vh) and formation energy (Eh) of micro-voids in the glassy network as well as the elasticity module (E) were calculated. The glass-forming ability was evaluated according to Hruby’s criterion (KG). A correlation between the composition and the properties of the (GeSe2)x(Sb2Se3)y(AgI)z glasses was established and comprehensively discussed..

Keywords

Chalcohalide glasses, Glass forming region, Physicochemical properties.

Submitted at: July 5, 2009
Accepted at: Dec. 10, 2009

Citation

V. VASSILEV, G. VASSILEV, J. DIKOVA, K. PETKOV, Glass formation in the GeSe2-Sb2Se3-AgI system, Journal of Optoelectronics and Advanced Materials Vol. 11, Iss. 12, pp. 2024-2028 (2009)