About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
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Materials and Chemistry for Molten Salt Systems
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Presentation Title |
Thermodynamic Properties of Gd-Bi Alloys Determined by EMF Measurements in LiCl-KCl-GdCl3 Electrolyte |
Author(s) |
Stephanie Castro Baldivieso, Nathan D. Smith, Sanghyeok Im, Hojong Kim |
On-Site Speaker (Planned) |
Stephanie Castro Baldivieso |
Abstract Scope |
Thermodynamic properties of Gd in liquid Bi (mole fraction, xGd = 0.02–0.35) were investigated using electromotive force (emf) measurements in molten LiCl-KCl-GdCl3 at 700-1048 K for the design of enhanced recovery processes for Gd utilizing strong chemical interactions between Gd and Bi. The use of pure Gd(s) as the reference electrode resulted in erratic emf values by dissolution into the molten salt. To mitigate the high reactivity of pure Gd(s), this work developed a stable, two-phase Gd-Bi alloy (xGd = 0.16) as the thermodynamic reference electrode, calibrated by electrodepositing pure Gd(s) in 25 K increments between 700-1048 K. Using this reference electrode, the emf values of Gd-Bi alloys were determined via coulometric titration technique at 773–973 K, resulting in the solubility, activity coefficient, and the excess partial molar Gibbs energy of Gd in liquid Bi. |
Proceedings Inclusion? |
Planned: |
Keywords |
Electrometallurgy, Extraction and Processing, Other |