Oxygen potential of solid solution EuyU1-yO2+x

Takeo Fujino, Nobuaki Sato, Kohta Yamada, Shohei Nakama, Kousaku Fukuda, Hiroyuki Serizawa, Tetsuo Shiratori

研究成果: Article査読

4 被引用数 (Scopus)


The oxygen potential, ΔḠO2, of EuyU1-yO2+x solid solution was measured as a function of x value for y = 0.05 and 0.1 at 1000, 1100 and 1200°C using an electrobalance. With the addition of europium, a significant increase in ΔḠO2 was observed in the hypostoichiometric region, but its effect was almost the same for y = 0.05 and 0.1 in the hyperstoichiometric region. The O/M (M=Eu + U) ratio, which yields the steepest change of ΔḠO2, decreased with decreasing temperature in the range ca.1000-1400°C for y = 0.1, although this effect was not seen for y = 0.05. The temperature dependence of this decrease seemed to be enhanced as the y value increased. Both the partial molar entropy and enthalpy of oxygen (ΔS̄O2 and ΔH̄O2) for y = 0.1 solid solution showed sharp large peaks at O/M ratios slightly less than 2. Such peaks emerge as a result of the above decrease of the O/M ratio for steepest change of ΔḠO2, with decreasing temperature.

ジャーナルJournal of Nuclear Materials
出版ステータスPublished - 1999 2月

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学
  • 材料科学(全般)
  • 原子力エネルギーおよび原子力工学


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