کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9585455 | 1392340 | 2005 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
X-ray photoelectron spectroscopy of CeO2-Na2O-SiO2 glasses
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: X-ray photoelectron spectroscopy of CeO2-Na2O-SiO2 glasses X-ray photoelectron spectroscopy of CeO2-Na2O-SiO2 glasses](/preview/png/9585455.png)
چکیده انگلیسی
A series of (CeO2)x-(Na2O)0.3-(SiO2)(0.7âx) glasses, where 0.025 â¤Â x â¤Â 0.075, have been synthesized and investigated by mean of X-ray photoelectron spectroscopy (XPS). The Ce 3d spin-orbit doublet was curve fitted in order to quantify the proportions of each cerium oxidation state in these glasses. It was found that Ce ions are predominantly in the Ce(III) state in glasses with compositions x â¤Â 0.075, while mixed Ce valences were found in the glass with composition x = 0.10. The O 1s spectra have also been curve fitted with two components, one from bridging oxygen (BO) and the other from non-bridging oxygen atoms (NBO). The measured number of NBO, based on the fact that only oxygen atoms in the site Si-O-Na+ contribute to the NBO peak, was found to be constant at â¼35% for all samples, in good agreement with the value calculated from the glass composition and inductively coupled plasma (ICP) suggesting that Ce ions enter the network as a glass intermediate. The thermal measurements done on these glasses agree well with the XPS findings.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electron Spectroscopy and Related Phenomena - Volume 142, Issue 1, January 2005, Pages 75-81
Journal: Journal of Electron Spectroscopy and Related Phenomena - Volume 142, Issue 1, January 2005, Pages 75-81
نویسندگان
A. Mekki,