Melt Homogonization And Self-Organisation In Chalcogenides - Part Ii

Bulk glass formation occurs in insulating, semi-conducting, metallic and H-bonded materials systems, but in selected range of chemical compositions. What is so special about these select melt compositions that can be cooled slowly to bypass crystallisation and yield large (gram sized) bulk glasses? Important clues to understanding this unusual behaviour evolved from Rigidity theory and experiment which have shown that bulk glass formation usually occurs in ranges when networks become isostatic at an optimal connectivity.