New chalcogenide glasses in the GeSe 2–Sb 2Se 3–PbSe system

Abstract

Chalcogenide glasses from the GeSe 2–Sb 2Se 3–PbSe system were synthesized for the first time. The glass-forming region was determinated by the help of visual, X-ray diffraction and electron microscopic analyses. The basic physico-chemical parameters such as density ( d), microhardness (HV) and the temperatures of phase transformations (the glass transition T g, crystallization T cr and melting T m) were measured. Compactness and some thermomechanical characteristics such as volume ( V h) and formation energy ( E h) of micro-voids in the glassy network, as well as the module of elasticity E were calculated. The overall mean bond energy 〈 E〉, the mean coordination number 〈 Z〉, the mean bond energy of the average cross-linking/atom and the average bond energy per atom of the “remaining matrix”, E ¯ c and E ¯ rm , as well as the average heteropolar bond energy E hb, the degree of “cross-linking/atom” P p and the molar volume V m were determinated.