SOME REMARKS ON THE GLASS-TRANSITION TEMPERATURE IN CHALCOGENIDE GLASSES: A CORRELATION WITH THE MICROHARDNESS

The glass-transition temperature Tg is known to be related to cohesive energy (e.g., mean bond energy E) in most binary and ternary chalcogenide glasses, while E is theoretically predicted parameter. It is reported here that the hardness H from the mechanical point of view, as an accessible physical parameter of cohesive energy, is shown to correlate with Tg in most chalcogenide glasses. A factor influencing Tg in chalcogenide glasses can be primary a short-range chemical-bond arrangement but not an inter-molecular interaction.