کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1477542 991187 2009 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis of La0.9Sr0.1Al0.85Mg0.1Co0.05O2.875 using a polymeric method
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Synthesis of La0.9Sr0.1Al0.85Mg0.1Co0.05O2.875 using a polymeric method
چکیده انگلیسی

Nanocrystalline La0.9Sr0.1Al0.85Mg0.1Co0.05O2.875 (LSAMC) powders were synthesized via a polymeric method using poly(vinyl alcohol) (PVA). The effect of PVA content on the synthesized powders was studied. When the ratio of positively charged valences (Mn+) to hydroxyl groups (OH) is 1.5:1, crystalline LaAlO3 could be obtained at such a low calcination temperature as 700 °C. While at 900 °C the ratio is of less importance, since pure LaAlO3 perovskite could be formed for all powders after calcination at 900 °C. Thermal analysis (TG/DTA) was utilized to characterize the thermal decomposition behaviour of precursor powders. The chemical structure of the calcined powder was studied by Fourier transform infrared (FTIR) spectroscopy. The powder morphology and microstructure were examined by SEM. Dense pellets with well-developed submicron microstructures could be formed after sintering at 1450 °C for 5 h. Compared with the solid-state reaction method, the sintering temperature is substantially lower for powder prepared by the PVA method. This is due to the ultrafine and highly reactive powder produced.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 29, Issue 6, April 2009, Pages 1133–1138
نویسندگان
, , ,