Oxygen Potentials of Pyrochlore-Type Am^sub 2^Zr^sub 2^O^sub 7+y

The relations between the oxygen potentials and the excess oxygen-nonstoichiometry (y) of the pyrochlore-type ... at 1333 K were measured by the electrochemical method using a zirconia solid electrolyte and the change of mass by oxidation and reduction. The oxygen potentials at 1333 K smoothly incre...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 2011-10, Vol.94 (10), p.3596
Main Authors: Otobe, Haruyoshi, Takano, Masahide, Hayashi, Hirokazu, Arai, Yasuo
Format: Article
Language:English
Subjects:
Ceramics
Electrocatalysis
Oxidation
Oxygen
Phase transitions
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Summary:The relations between the oxygen potentials and the excess oxygen-nonstoichiometry (y) of the pyrochlore-type ... at 1333 K were measured by the electrochemical method using a zirconia solid electrolyte and the change of mass by oxidation and reduction. The oxygen potentials at 1333 K smoothly increased from -516.5 to 0.00 kJ/mol with increasing y from 0.00 to 0.56. It was found that the oxygen potentials of ... were higher than those of ... and ... measured in our previous studies at 1333 K. The results were discussed with the valence state and ionic radius of cations as well as the phase relations. (ProQuest: ... denotes formulae/symbols omitted.)
ISSN:0002-7820
1551-2916