New chalcogenide glasses in the GeSe2–Sb2Se3–PbSe system

Chalcogenide glasses from the GeSe2–Sb2Se3–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 Tg, crystallization Tcr and melting Tm) were measured. Compactness and some thermomechanical characteristics such as volume (Vh) and formation energy (Eh) 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 Ehb, the degree of “cross-linking/atom” Pp and the molar volume Vm were determinated.