Thermophysical properties of molten Ga2O3by using the electrostatic levitation furnace in the International Space Station

We measured the thermophysical properties of molten gallium oxide (Ga2O3) in a contamination-free and microgravity environment by using the electrostatic levitation furnace in the International Space Station. The density of molten Ga2O3was obtained over a wide temperature range of 2001–2174 K including the undercooled state and found to be expressed as 5004.8–0.4478(T− Tm) (kg m−3), where Tm, the melting point, is 2066 K. Measurements of its viscosity and surface tension were also performed by using the drop oscillation method and these values were found to be 337.0 (10−3N m−1) and 13.6 (10−3 Pa·s) at 2228 K, respectively.