Abstract
Measurements of oxygen potential on uranium-plutonium mixed oxides by means of solid state galvanic cells are discussed and compared with precedent data. Discrepancies in the\(\Delta \bar G_{O_2 } \) values at low temperature (1000 K) as well as in the\(\Delta \bar G_{O_2 } \) versusT slopes are found, which disappear when the samples are thermally cycled. An analysis is performed of this effect, showing that the absence of a good homogeneization of the sample in oxygen and/or in plutonium content can give rise to mixed potentials and hence to erroneous results.
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Toci, F., Manes, L., Ewart, F.T. et al. On the determination of oxygen potentials and O/M ratios in mixed U-Pu oxides by means of solid state galvanic cells. J Appl Electrochem 9, 399–401 (1979). https://doi.org/10.1007/BF01112496
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DOI: https://doi.org/10.1007/BF01112496