Evolution of glass properties during a substitution of S by Se in Ge28Sb12S60-xSex glass network

Guillaume Guery (1, 2) , David J. Musgraves (1) , Christine Labrugère (2) , Evelyne Fargin (2) , Thierry Cardinal (2) , Kathleen Richardson (1)

1 COMSET - School of Materials Science and Engineering
2 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux

In this paper, a detailed study to examine the influence of chalcogen S/Se mole % in the Ge28Sb12S60 −xSexglass system, with x = 0, 15, 30, 45 and 60, is presented that provides insight into the effect of chalcogen content on the glassnetwork and properties. Specifically, we report results of a systematic study to evaluate the relationship between compositional variation, glassproperties and dominant bonding configurations. These materials are important to applications in optics manufacturing where correlation of physical and optical properties is required to predict fabrication behavior and ultimate material performance. It has been found that the dominant bonds in the glass system change upon reaching a specific molar ratio (percentage, %) of chalcogen substitution, between 30 < x < 45 mol%, changing from Ge―Se to Sb―Se bonds as the dominant bond type. This singularity has been observed using micro-Raman spectroscopy and X-ray photoelectron spectroscopy. This effect of the dominant bond configurational change was also shown to impart changes in important physical properties including micro-hardness, thermal properties, and the glass' viscometric behavior. Results indicate that the observed dominant bond change was responsible for a constant value in the evolution of both the micro-hardness and calorimetric glass transition temperature. The viscosity was also affected by the change in dominant bond type, breaking the monotony of the viscosity evolution during the Ssubstitution, due to the total strength of the vitreous system which does not linearly increase.

Mots clés: Chalcogenide glass; Raman spectroscopy; X-ray photoelectron spectroscopy; Glass properties

Domaines: Matériaux

Guillaume Guery, David J. Musgraves, Christine Labrugère, Evelyne Fargin, Thierry Cardinal, et al.. Evolution of glass properties during a substitution of S by Se in Ge28Sb12S60-xSex glass network. Journal of Non-Crystalline Solids, 2012, 358 (15), pp.1740-1745. ⟨10.1016/j.jnoncrysol.2012.05.007⟩. ⟨hal-00712602⟩