|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Advanced Real Time Imaging
||Molten State Physical Properties of Divalent and Trivalent Alkaline Earth, Transition Metal, and Rare Earth Oxides
||Jonathan Paras, Osamu Takeda, Mindy Wu, Antoine Allanore
|On-Site Speaker (Planned)
Molten oxide physicochemical properties are difficult to study because oxides melt at high temperature, necessitating the use of containerless methods. Molten oxide droplets of Al<sub>2</sub>O<sub>3</sub>, Sc<sub>2</sub>O<sub>3</sub>, MgO, Y<sub>2</sub>O<sub>3</sub>, and La<sub>2</sub>O<sub>3</sub> were suspended in the hot-zone of a floating zone furnace, wherein their density, melting points, and surface tensions were studied in-situ using live video.
The performance of the chosen methods was validated against the properties of molten Al<sub>2</sub>O<sub>3</sub>, which has been well studied. To the best knowledge of the authors, our study represents the first time measurements of the surface tension and density of MgO and Sc<sub>2</sub>O<sub>3</sub> have been reported. A trend between the surface tension and enthalpy of vaporization of molten oxides has
been proposed. Comparisons were drawn with similar relationships presented for molten metals and semiconductors.
||High-Temperature Materials, Ceramics,