Abstract
Nanophase separation in the bulk Ge–As–Se chalcogenide glasses was observed by SEM and supported by XRD and IR measurements. Effects of nanophase separation on glass transition temperature ( T g ), microhardness ( H v ), optical band gap ( E opt ) and thermal expansion coefficient ( α ) were investigated in terms of glass rigidity transitions. According to the correlations between the properties and average coordination number Z , it is established that nanophase separation becomes more intensive when Z is larger than 2.64.
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