From Slag to New Glass

Introduction to basicity of oxide

Abstract

Oxides are classified into four types in terms of ionic radius and electric negativity for designing multicomponent oxide materials. The properties of molten oxide, e. g., slag, flux, and glass are determined by the activity of oxygen ions, whose volume fraction is near 50% in oxides. The activity of oxygen ions is quantified based on basicity. A calculated basicity parameter for multicomponent oxides is proposed using coulomb force between the cation and the oxygen ion. The valencies, oxygen-coordinationnumbers of metal ions and the polymerization degree of silicate anions in crystalline and vitreous oxides are disscussed using the basicity parameter.