EVALUATION OF GLASS-FORMATION CRITERIA

In this paper it is shown that the electronegativity values of the constituent atoms of a binary compound can be used to predict the formation of fluoride and other halide glasses. It is also shown that bond strength can be used as a secondary criterion, to explain most discrepancies. In trying to obtain more fundamental insight towards glass formation, special emphasis has been placed on the covalent part of the bond energies. It is shown to what extent knowledge of these energies provides a useful basis for prediction of glass formation.