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 {Mathematical expression} values at low temperature (1000 K) as well as in the {Mathematical expression} versus T 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. © 1979 Chapman and Hall Ltd.
Toci, F., Manes, L., Ewart, F., Mari, C. (1979). On the determination of oxygen potential and O/M ratios in mixed U-Pu oxides by means of solid state galvanic cell. JOURNAL OF APPLIED ELECTROCHEMISTRY, 9(3), 399-401 [10.1007/BF01112496].
On the determination of oxygen potential and O/M ratios in mixed U-Pu oxides by means of solid state galvanic cell
MARI, CLAUDIO MARIA
1979
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 {Mathematical expression} values at low temperature (1000 K) as well as in the {Mathematical expression} versus T 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. © 1979 Chapman and Hall Ltd.
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