Density Measurement of Molten Oxides of SiO2-CaO-Al2O3 System by Aerodynamic Levitated Technique

Abstract

In this study, we measured the density of a molten oxide of SiO2-CaO-Al2O3 system using Aerodynamic Levitation (ADL) with CO2-laser heating which can achieve container-less and non-contact conditions for measurements. For density measurements, we improved our ADL system to obtain the appropriate shape for the droplet based on the previously reported system by Langstaff et al. We measured the density of molten CaAl2O4 between 1600 to 2300K. We conclude that our ADL system has the potential to precisely measure molten oxide density due to good agreement of our density of CaAl2O4 with previous data. Using these techniques, we succeeded also to measure the density of a molten SiO2-CaAl2O4 oxide system and discussed the molar volume change by varying the SiO2 composition.