Fusible Glass Based on Glassy Chalcogenide Type Systems Ge-S(Se)Br, Ge-S(Se)I

Abstract

Theoretical and practical results on the preparation and investigation of low-melting glasses using the example of glassy chalcogenide glasses of the Ge-S-Br, Ge-Se-Br systems are presented and summarized. On the basis of fundamental properties of matter, correlations were identified with uniform positions. The glass formation regularities in the indicated chalcogenide and oxyhalide systems were determined. Areas and compositions of low-melting chalcogenide and oxyhalide glasses were considered. Approaches to obtaining of thermostable and difficult to crystallize low-melting glasses were found. Areas of their practical application were identified. On the basis of the obtained data, approaches and criteria for obtaining compositions of low-melting chalcogenide and oxide glasses with practically useful properties are formulated.

Structural and vibrational characteristics of Ge-S-Br glass system: ab initio calculation and Raman study

“…However, since limited knowledge of the Ge-S-Br glass system, there is no generally accepted agreement on the presence of structural fragments in Ge-S-Br glasses. Some authors concluded the Ge-S-Br glasses with a polymer network that consists of GeS 4/2 and S chains linked by bonds and dissolved GeBr 4 molecules [11]. On the other hand, Ge-S-Br glasses were investigated by Raman spectra, which were hypothesized with mixed tetrahedra GeS 4-n Br n formed in Ge-S-Br glasses [12].…”