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
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Stability of SrFeO3 based materials in the presence of SiOx species in humid atmosphere at high temperatures and pressures
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
نویسندگان
, , , , ,