کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9793784 1514280 2005 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electrical conductivity and non-stoichiometry in the (U,Gd)O2±x system
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی هسته ای و مهندسی
پیش نمایش صفحه اول مقاله
Electrical conductivity and non-stoichiometry in the (U,Gd)O2±x system
چکیده انگلیسی
The isothermal electrical conductivity and oxygen potential of the (U,Gd)O2±x solid solution were measured in various oxygen partial pressure regions at 1200 °C and 1300 °C. The electrical conductivity gradually decreased with decreasing oxygen partial pressure even in the hypo-stoichiometric region. These findings were in contrast to the implication of a hypo-stoichiometry where the electrical conductivity is increased through the formation of oxygen vacancies. The (U1−yGdy)O2−y/2 was defined as a new stoichiometric composition to determine the relationship between the deviation of the oxygen composition from stoichiometry and oxygen partial pressure. The dependence of the new oxygen deviation, z in (U1−yGdy)O2−y/2+z, on the oxygen partial pressure corresponds to the dependence of the electrical conductivity, and thus a consistent defect structure model can be deduced from both the dependence curves. It suggests that the defect type is oxygen interstitial even below the oxygen composition of 2.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Nuclear Materials - Volume 340, Issues 2–3, 15 April 2005, Pages 171-178
نویسندگان
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