کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
190037 459691 2010 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of electrode polarisation on the determination of electronic conduction properties of an oxide ion conductor
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Effect of electrode polarisation on the determination of electronic conduction properties of an oxide ion conductor
چکیده انگلیسی

The p-type electronic conduction parameter p⊕ of Gd0.85Ca0.15AlO3−δ, a predominantly oxide ion conductor, has been determined as a function of temperature by simultaneously taking into account the results of oxygen permeation and cell potential difference measurements under various oxygen partial pressures in the surroundings of the ceramic electrolyte. Using a non-linear optimization procedure applied to the experimental data, the polarisation resistances at anode and cathode can be quantified separately, which allows to obtain p⊕ values that are corrected for the electrode polarisation. At lower measuring temperatures, the value of p⊕ was found to be to be time-dependent. p⊕ increased by an order of magnitude when the specimen is kept at 650 °C over a period of 1500 h.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 55, Issue 28, 1 December 2010, Pages 8766–8770
نویسندگان
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