کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1478108 | 991210 | 2007 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Stability of SrFeO3 based materials in the presence of SiOx species in humid atmosphere at high temperatures and pressures
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
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چکیده انگلیسی
Strontium silicate was found on the surface of La0.2Sr0.8Fe0.79Cr0.2Mg0.01O3 exposed to hydrogen containing humid atmospheres at 1000 °C and 30 bars. Silica originated from the furnace tube material and was transported via the gas phase as a gaseous silica hydrate. Fe and Sr were initially preferentially expelled from the perovskite grain boundaries to give Sr2SiO4 at the surface, along with a secondary Fe-rich phase and a LaCrO3-rich grain boundary region. Eventually, Fe and Sr were drawn from the grains, leaving a porous structure. This investigation highlights the importance of avoiding Si sources near Sr-rich membranes in humid atmospheres at high temperatures.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 27, Issue 16, 2007, Pages 4509–4514
Journal: Journal of the European Ceramic Society - Volume 27, Issue 16, 2007, Pages 4509–4514
نویسندگان
Ingeborg Kaus, Kjell Wiik, Marit Dahle, Morten Brustad, Siv Aasland,