کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1298005 1498369 2008 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis and characterization of oxygen-deficient oxides BaCo1 − xYxO3 − y, x = 0.15, 0.25 and 0.33, with the perovskite structure
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Synthesis and characterization of oxygen-deficient oxides BaCo1 − xYxO3 − y, x = 0.15, 0.25 and 0.33, with the perovskite structure
چکیده انگلیسی

Oxygen-deficient complex cobalt oxides BaCo1 − xYxO3 − y, = 0.15, 0.25 and 0.33, with a cubic perovskite structure have been synthesized in air at 1100 °C using a citrate route. Cation composition of the compounds was confirmed by energy-dispersed X-ray (EDX) microanalysis while oxygen content was determined by iodometric titration. An electron diffraction (ED) study of the x = 0.25 and 0.33 compositions show the presence of a diffuse intensity, indicating possible short-range ordering of the B cations. It was found that the treatment of BaCo0.75Y0.25O2.55 in a humid atmosphere leads to the absorption of water vapour at the first stage. Oxygen permeation studies of the ceramic membranes of BaCo0.75Y0.25O2.55 and BaCo0.67Y0.33O2.55 with variable thickness showed high oxygen fluxes of 0.17–0.32 µmol/cm2/s at 950 °C.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Ionics - Volume 179, Issues 33–34, 15 October 2008, Pages 1885–1889
نویسندگان
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