Interatomic Potential for xNa₂O-(1−x)SiO₂ Glasses

Abstract

The interatomic potential for a wide composition range of sodium silicate glasses was proposed by first-principles calculation. Point charge was set for each glass composition on the basis of population analysis of the alkali silicate crystals by using the density functional theory. The potential parameters were obtained from the energy surface of the SiO²⁺ model by using the molecular orbital method. The molecular dynamics simulation using the new interatomic potential showed improved structures of sodium silicate glasses.