کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1298763 | 1498371 | 2008 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Oxygen stoichiometry and transport properties of cerium niobate
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
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چکیده انگلیسی
CeNbO4 + δ has been synthesized by both solid state and wet chemical routes and characterized with respect to electrical conductivity and oxygen stoichiometry between 900 °C and 1100 °C and pO2 from 1 bar to 0.002 bar. CeNbO4 + δ was shown to exhibit mixed conductivity with oxygen interstitials and electron holes being the major charge carriers. The activation energies for chemical diffusion (Dchem) and surface exchange coefficient (kchem), determined by electrical relaxation measurements, were 55.8 ± 3.7 and 198 ± 20 kJ/mol, respectively. Finally, both Dchem and kchem were reduced with decreasing partial pressure of oxygen.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Ionics - Volume 179, Issues 21–26, 15 September 2008, Pages 1061–1065
Journal: Solid State Ionics - Volume 179, Issues 21–26, 15 September 2008, Pages 1061–1065
نویسندگان
Fride Vullum, Tor Grande,