Local structure of liquids Al2O3 and GeO2 under densification

Molecular dynamic simulation has been conducted to study the local structure of liquid Al2O3 and GeO2 under densification. Those liquids are found to be a mixture of species of TOx. Here T is Ge or Al and x = 4, 5 and 6. This result is supported by the fact that the density, fraction of oxygen connectivity and volume of different void kinds are a linear function of TOx fraction. The microscopic mechanism of liquid densification is quantified and interpreted in term of the change in TOx fraction.