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Oxygen potential measurements of Am$$_{0.5}$$Pu$$_{0.5}$$O$$_{2-x}$$ by EMF method

Otobe, Haruyoshi  ; Akabori, Mitsuo; Arai, Yasuo

The dependence of the oxygen potentials on oxygen non-stoichiometry and temperature of Am$$_{0.5}$$Pu$$_{0.5}$$O$$_{2-x}$$ has been elucidated by electromotive force (EMF) measurements. The ${it x}$ value of Am$$_{0.5}$$Pu$$_{0.5}$$O$$_{2-x}$$ was changed at 1333 K over 0.02 $$<$$ ${it x}$ $$leq$$ 0.25 by the coulomb titration method. The temperature dependence of the oxygen potential was also measured in the range of 1173-1333 K. It was found that the oxygen potential decreased from -80 to -360 kJmol$$^{-1}$$ with increasing ${it x}$ from 0.021 to 0.22 at 1333 K and that those remained almost constant at -360 kJmol$$^{-1}$$ around ${it x}$ = 0.23. It was concluded that Am$$_{0.5}$$Pu$$_{0.5}$$O$$_{2-x}$$ should be composed of the single fluorite-type phase over 0.02 $$<$$ ${it x}$ $$leq$$ 0.22 and the mixed phases of fluorite-type and (Am,Pu)$$_9$$O$$_{16}$$ around ${it x}$ = 0.23.

Language

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English

Journal

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Journal of Nuclear Materials

Volume

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389

Number

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1

Pages

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p.68 - 71

Publication Year/Month

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2009/05

Meeting title

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12th Symposium on Thermo-chemistry and Thermo-physics of Nuclear Materials (ST$$^{2}$$NM 2008)

Held date

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2008/08

Location (city)

 :

P$"o$rtschach

Location (country)

 :

Austria

Patent information

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PDF

 :


Paper URL

 :

https://doi.org/10.1016/j.jnucmat.2009.01.009

DOI for research data

 :

Keywords

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no keyword

Research Facility

 :

BECKY(バックエンド研究施設)  

Press Release

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Article of JAEA R&D Review

 :

Cooperating Institute

 :

文部科学省

Accesses

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- Accesses

InCites™

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Percentile:72.88

Category:Materials Science, Multidisciplinary

Altmetrics

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