کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7721620 | 1497516 | 2013 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Low temperature synthesis of Yb doped SrCeO3 powders by gel combustion process
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Low temperature synthesis of Yb doped SrCeO3 powders by gel combustion process Low temperature synthesis of Yb doped SrCeO3 powders by gel combustion process](/preview/png/7721620.png)
چکیده انگلیسی
In this work, SrCe0.9Yb0.1O3âδ powders were synthesized by a gel combustion method which combined gel process and combustion process. The effect of ratio of citric acid to metal cations (C/M), oxidizer and calcination temperature on the properties of powders was investigated in detail. It was found that the extra oxidizer NH4NO3 increased the flame temperature of combustion and thus promoted the formation of SrCeO3. The relative amount of SrCeO3 in powder increased as the C/M ratio increased. The as-ignited powder at 250 °C mainly consisted of the perovskite SrCeO3, i.e. relative amount of 95.2 wt%. The adiabatic flame temperature of the combustion reaction was calculated to be 1903.1 °C, higher than the required formation temperature of 787.2 °C for SrCeO3. Furthermore, the pure perovskite phase powder with agglomerated microstructure and average grain size of 2 μm was obtained after calcination at 1200 °C for 5 h. This heat-treatment temperature is 200 °C lower than the conventional solid state reaction method for SrCe0.9Yb0.1O3âδ preparation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 38, Issue 29, 30 September 2013, Pages 12921-12926
Journal: International Journal of Hydrogen Energy - Volume 38, Issue 29, 30 September 2013, Pages 12921-12926
نویسندگان
Chao Zhang, Shuai Li, Xiaopeng Liu, Xushan Zhao, Di He, Haochen Qiu, Qinghe Yu, Shumao Wang, Lijun Jiang,