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Meeting 2017 TMS Annual Meeting & Exhibition
Symposium High Temperature Electrochemistry III
Presentation Title Effects of Oxide Precursor Preparation Parameters on the Electrochemical Reduction of Tantalum Pentoxide in Calcium Chloride Melt
Author(s) Maureen P Chorney, Bridger P. Hurley, Prabhat Tripathy, Jerome P. Downey
On-Site Speaker (Planned) Maureen P Chorney
Abstract Scope Successful electrochemical reduction of a metal oxide to its constituent metal depends upon two broad unit operations: (i) preparation of the oxide precursor with ideal morphological features and (ii) electrochemical reduction under optimum process parameters. The critical parameters that affect mechanical strength and open porosity of the precursor are oxide particle size; green pellet preparation; and sintering time, temperature, and atmosphere. A judicious combination of these process parameters will produce an ideal precursor for achieving complete reduction. Uniaxial pressing was utilized to prepare 13 mm diameter cylindrical pellets, which were sintered in either oxidizing (air) or reducing atmospheres. Sintered pellets were characterized by XRD, SEM-EDS, and porosity measurement techniques. Electrochemical reduction experiments were performed with a molten calcium chloride electrolyte in a cell with a three electrode configuration. Transient electrochemical techniques were employed to assess the effects of the precursor parameters on the reducibility of the sintered oxide specimens.
Proceedings Inclusion? Planned: Supplemental Proceedings volume


Effects of Oxide Precursor Preparation Parameters on the Electrochemical Reduction of Tantalum Pentoxide in Calcium Chloride Melt
Electrochemical and Thermodynamic Properties of Gadolinium Chloride in LiCl-KCl Eutectic Salt
Electrochemical Behavior of Sn/SnCl2 Cathode in Na | NaCl-AlCl3-SnCl2 | Sn Cell
Electrochemical Deposition of Barium into Liquid Bismuth from BaCl2-LiCl-CaCl2-NaCl Electrolyte
Electrochemical Synthesis of TaC in Molten Salt
Electrochemical Techniques for Nuclear Safeguards in Molten Salt
Electrochemistry in Molten 2LiF-BeF2 Salt for the Fluoride Salt-Cooled High Temperature Reactor Applications
Impurity Removal from Titanium Oxycarbide
Initial Operation of Kg-Scale Electrolytic Reduction and Salt Distillation Equipment for the Pyroprocessing of Uranium Oxide in a Hot Cell
Molten Flux Design for Solid Oxide Membrane Based Electrolysis of Si from Silica
Optimized Voltammetry Methods for Measuring Concentration of Multiple Rare Earths and Actinides in Molten LiCl-KCl
Thermal Imaging Furnace Technique for Ultra-high Temperature Electrochemical Measurements
Thermochemical Properties of Barium-Bismuth Alloys Determined by Emf Measurements
Thorium and Uranium Electrodeposition from Molten LiCl-KCl onto Alpha Spectroscopy Semiconductor Detector Surface
Zirconium Management in the Mk-IV Electrorefiner

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