کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7731062 | 1497939 | 2015 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synthesis and characterization of calcium and iron co-doped lanthanum silicate oxyapatites by sol-gel process for solid oxide fuel cells
ترجمه فارسی عنوان
سنتز و مشخصه اکسایپاتیت سیلیکات لانتانیم با دوز کلسیم و آهن با استفاده از سل ژل برای سلول های سوخت جامد اکسید
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کلمات کلیدی
سلول های سوختی اکسید جامد، الکترولیت، اکسایاپاتیت سیلیکات لانتانیم، روند سل ژل، هدایت اکسید-یون،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
چکیده انگلیسی
Lanthanum silicate oxyapatites with and without calcium (Ca) and iron (Fe) doping, La10Si5FeO26.5 (LSFO) and La9.5Ca0.5Si5.5Fe0.5O26.5 (LCSFO), are synthesized by sol-gel process (SGP) and solid state reaction process (SSP). The phase formation, microstructure and conductivities of LSFO and LCSFO oxyapatites are characterized by X-ray diffraction (XRD), scanning electron spectroscopy (SEM) and complex impedance analysis. The morphologies of LCSFO oxyapatite nanoparticles synthesized by SGP were characterized by transmission electron microscope (TEM). The thermal and decomposition properties of the LCSFO gel were analyzed by simultaneous differential scanning calorimetry and thermal gravimetric analysis (DSC-TGA). The results show that the phase formation of LCSFO synthesized by SGP occurs at temperatures as low as 750 °C, significantly lower than â¼1500 °C required for LCSFO synthesized by SSP. Co-doping of Ca and Fe significantly improves the densification, sinterability and oxide-ion conductivity of lanthanum silicate oxyapatites. The best results were obtained on LCSFO synthesized by SGP, achieving oxide-ion conductivity of 2.08 Ã 10â2 S cmâ1 at 800 °C, which is higher than 5.68 Ã 10â3 S cmâ1 and 1.04 Ã 10â2 S cmâ1 for LSFO and LCSFO synthesized by SSP, respectively, under the identical test conditions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 293, 20 October 2015, Pages 806-814
Journal: Journal of Power Sources - Volume 293, 20 October 2015, Pages 806-814
نویسندگان
Xiao Guo Cao, San Ping Jiang, Yun Yong Li,