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Oxygen potentials of (Am$$_{0.5}$$Np$$_{0.5}$$)O$$_{2-x}$$

Am$$_{0.5}$$Np$$_{0.5}$$)O$$_{2-x}$$酸素ポテンシャル測定

音部 治幹  ; 赤堀 光雄; 荒井 康夫; 湊 和生 

Otobe, Haruyoshi; Akabori, Mitsuo; Arai, Yasuo; Minato, Kazuo

Am$$_{0.5}$$Np$$_{0.5}$$O$$_{2-x}$$の酸素ポテンシャルをジルコニア固体電解質を用いたEMF法で明らかにした。Am$$_{0.5}$$Np$$_{0.5}$$O$$_{2-x}$$${it x}$は、1333Kで0.02$$<$$${it x}$ $$leq$$0.25の範囲でクーロン滴定法により変化させた。${it x}$が0.021から0.25まで増加したとき、酸素ポテンシャルは-93.63から-440.18kJmol$$^{-1}$$まで一様に減少した。酸素ポテンシャルの温度依存性についても、${it x}$が0.021$$sim$$0.243で温度が1000$$sim$$1333Kの範囲で測定した。酸素ポテンシャルの温度依存性は、これらの${it x}$や温度範囲では、ほとんど線形的であった。

The oxygen potentials of the oxygen-deficient fluorite-type oxide Am$$_{0.5}$$Pu$$_{0.5}$$O$$_{2-x}$$ were measured by the electrochemical method with using a zirconia solid-electrolyte. The coulomb titration has been made for the sample at 1333 K over 0.02 $$<$$ ${it x}$ $$leq$$ 0.25. The oxygen potentials were -93.63 and -440.18 kJmol$$^{-1}$$ for ${it x}$ = 0.021 and 0.25 at 1333 K, respectively. The temperature dependence of the oxygen potentials was also measured between 1000 and 1333 K over the ${it x}$ range of 0.02 $$<$$ ${it x}$ $$leq$$ 0.243. The temperature dependence was almost linear over the ${it x}$ and temperature ranges concerned.

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パーセンタイル:42.38

分野:Materials Science, Ceramics

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