کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1619686 | 1516386 | 2010 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of carbonization temperature on the textural properties of Ce0.8Zr0.2O2 solid solution by an improved citrate sol-gel method
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Ce0.8Zr0.2O2 solid solutions were prepared via an improved citrate sol-gel method, in which a carbonization pretreatment in N2 atmosphere at a high temperature was employed prior to the calcination of the citrate precursor in air atmosphere. The effect of carbonization temperature on the textural properties of Ce0.8Zr0.2O2 solid solutions has been investigated, using TG-DSC, Raman, XRD, TEM, SEM and BET techniques. With low carbonization temperature, the Ce0.8Zr0.2O2 oxides in intermediate carbonized mixtures remained in amorphous state, which could eventually agglomerate to large particles with low surface area after subsequent calcination in air atmosphere. In comparison, with high carbonization temperature, thermodynamic force drove Ce0.8Zr0.2O2 oxides to be crystallized into large particles, which would not agglomerate further in oxidation step (carbon removal), thus leading to a material with high surface area and porous structure.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 493, Issues 1â2, 18 March 2010, Pages 169-174
Journal: Journal of Alloys and Compounds - Volume 493, Issues 1â2, 18 March 2010, Pages 169-174
نویسندگان
Guan-Qun Xie, Ji-Qing Lu, Hai-Ying Zheng, Xi-Jing Liu, Meng-Fei Luo, Xiao-Nian Li,