| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
High Temperature Electrochemistry IV
|
| Presentation Title |
Electrochemical Reactions of Oxide Ions with Tungsten in Molten CaCl<sub>2</sub> |
| Author(s) |
Chao Zhang, Devin Rappleye, Michael F. Simpson |
| On-Site Speaker (Planned) |
Michael F. Simpson |
| Abstract Scope |
In support of development of a real time electrochemical sensor for measuring oxide ion concentrations in molten CaCl<sub>2</sub>, cyclic voltammetry was run in molten CaCl<sub>2</sub> with controlled additions of CaO. The magnitude of an oxidation peak at close to 0 V versus a W quasi-reference electrode correlated linearly with concentration of added CaO. The reaction mechanism appears to consist of two electrochemical steps followed by a chemical reaction to form CaWO<sub>4</sub>, which is soluble in the salt. These findings are beneficial to controlling electrochemical nuclear material processing such as direct oxide reduction of actinides. A simple probe consisting of three W rods can be used to monitor CaO concentration in real time. |
| Proceedings Inclusion? |
Planned: |