Oxygen potential measurement of americium oxide by electromotive force method

Otobe, Haruyoshi ; Akabori, Mitsuo; Minato, Kazuo

The oxygen potentials of AmO $_{2-x}$ were measured in the range of 0.01 to 0.5 and the temperature range of 1000 to 1333 K by the electromotive force (EMF) method. The oxygen potentials at 1333 K were -19.83 kJ/mol for =0.01 and -319.1 kJ/mol for =0.485, which were higher than those of CeO $_{2-x}$ by approximately 200 kJ/mol for the corresponding values. From the dependence of the oxygen potentials on and temperature, a tentative phase diagram of Am-O system was proposed, which suggested the presence of the intermediate phases of Am $_{7}$ O $_{12}$ and Am $_{9}$ O $_{16}$ in the Am-O system.

Language	:	English
Journal	:	Journal of the American Ceramic Society
Volume	:	91
Number	:	6
Pages	:	p.1981 - 1985
Publication Year/Month	:	2008/06
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Paper URL	:	https://doi.org/10.1111/j.1551-2916.2008.02374.x
DOI for research data	:
Keywords	:	no keyword
Research Facility	:	BECKY(バックエンド研究施設)
Press Release	:
Article of JAEA R&D Review	:	Elucidating Thermal Change in Am-Containing Oxide Fuels; Investigation of Thermodynamic Properties of Nonstoichiometric Am Oxides[/]
Cooperating Institute	:	日本原子力発電; 東京電力; 東北電力

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Registration No. : AA20070618
JAEA Abstracts No. : 36001086
Paper Submission No. : 4403

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