PERIODIC GLASS FORMATION SYSTEM

Abstract

The article proposes the periodic system of glass formation which is based on the model of glass formation where the possibility of forming glasses based on simple substances and simi­lar alloys is associated with the features of the electronic configurations of atoms, such as sta­ble electronic configurations s0, s2, p0, p3, p6, d0, d5, d10, f 0, f 7 and f 14. It results in primary and secondary periodic dependence of the tendency to glass formation of substances of differ­ent nature. Presumably, the glass formation in alloys is promoted by structural-configura­tio­nal equilibria, which are formed in vitrifying melts at the glass melting tempera­ture between clusters of different degrees of polymerization, which are formed due to the fact that the elec­tronic configurations of atoms in different chemically bonded states are close in terms of ener­gy and correspond to both low — and high-molecular states of molecular groups in melts. The author proposes the parameters of glass formation, which are determined quanti­tatively, char­acterizing the ability of the atoms of the chemical elements that make up the melt to form a glassy network. The dependence of these parameters on the charge of the nucleus of the ele­ments proves the primary and secondary periodicity of the tendency to glass formation in the case of sulfide, selenide, telluride, oxide and halide systems. The electronic configura­tion mod­el turned out to be applicable to diamond-like and metallic systems. On the basis of the propo­sed theoretical concepts and data on the regions of glass formation of binary and ternary sys­tems, a periodic system of glass formation of substances is proposed, i. e. the ability of simple substances and their alloys to form massive non-equilibrium non-crystalline objects.