期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 339, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2021.129831
关键词
Lithium conducting ceramics; Electrochemical sensors; Molten metals; Lithium; Lead-lithium
资金
- MINISTERIO DE CIENCIA, INNOVACION Y UNIVERSIDADES of SPAIN [RTI2018-095045-B-I00]
This study designed and tested electrochemical sensors based on solid electrolytes for measuring lithium concentrations in molten lead-lithium alloys. Experimental results showed a linear relationship between Open Circuit Potential values and the logarithm of lithium activities, fulfilling the Nernst equation.
The development of effective breeding blankets is crucial to the success of future fusion reactors. One of the main liquid breeding candidates is molten eutectic Pb-Li. In this environment, it is essential to control lithium concentration and dosage to keep the adequate composition in the melt. In this frame, on-line and on-board lithium monitoring tools, which can operate under extreme conditions, are required. Electrochemical sensors based on lithium conducting solid electrolytes (Li6La3Ta1.5Y0.5O12 and Li6BaLa2Ta2O12) were designed and tested. These potentiometric sensors were used to measure the Open Circuit Potential (OCP) in molten lead-lithium alloys with different lithium concentrations. Measurements were performed at 400 ?C, 500 ?C, and 600 ?C. Experimental OCP values were in good agreement with those calculated with the Nernst equation. OCP values showed a linear relationship versus the logarithm of the lithium activities, fulfilling the Nernst equation.
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