کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1257509 971566 2012 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Conductivity and chemical stability of SrCe0.92Nb0.03Tm0.05O3−δ membrane prepared by modified sol–gel method
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Conductivity and chemical stability of SrCe0.92Nb0.03Tm0.05O3−δ membrane prepared by modified sol–gel method
چکیده انگلیسی

SrCe0.92Nb0.03Tm0.05O3−δ powders were synthesized by a modified sol–gel method using citrate as a chelating agent. X-ray diffraction (XRD) analysis verified SrCe0.92Nb0.03Tm0.05O3−δ powders and membranes consisting of a single perovskite phase. The morphologies of the sintered membranes were investigated by using scanning electron microscopy (SEM) technique. Stability tests demonstrated that the Nb introduction into doped strontium cerate greatly enhanced the chemical stability. Electrical conductivities of SrCe0.92Nb0.03Tm0.05O3−δ and SrCe0.95Tm0.05O3−δ were measured by the four-point DC method under 10% H2/He atmosphere and temperatures (700–900 °C). With a maximum conductivity of 0.0067 S cm−1 at 900 °C, the total electrical conductivity of SrCe0.92Nb0.03Tm0.05O3−δ increases with increasing temperature. The H2 permeation flux of SrCe0.92Nb0.03Tm0.05O3−δ is 0.035 mL cm−2 min−1 when 40% H2/He and Ar were used respectively as the feed and sweeping gases at 900 °C.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chinese Chemical Letters - Volume 23, Issue 8, August 2012, Pages 957–960
نویسندگان
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