کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7903670 | 1510460 | 2013 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Quantitative determination of cerium oxidation states in alkali-aluminosilicate glasses using M4,5-edge XANES
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A calibration method for quantitative determination of Ce4 +/Ce3 + in alkali-aluminosilicate glasses using Ce M4,5-edge X-ray absorption near edge structure (XANES) spectroscopy is presented. Samples of varying alkali oxide content synthesized over a range of temperatures and oxygen fugacities (fO2) were analyzed using both synchrotron-based XANES and traditional wet chemical techniques. Based on comparison to potentiometric determinations of Ce4 +/Ce3 + in digested portions of our samples, Ce4 + was found to have a greater fluorescence yield (FLY) response to the incident radiation in the M4,5-edge XANES region than Ce3 +. This results in an overestimation of the Ce4 +/Ce3 + ratio when directly comparing the contributions of the two oxidation states to the total M-edge area, as has been used for crystalline materials. We offer a correction to M-edge determined Ce4 +/Ce3 + ratios as follows:Ce4+/ΣCe=578.7Ce4+/ΣCe±5%XANESA±0.0040
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Crystalline Solids - Volume 378, 15 October 2013, Pages 258-264
Journal: Journal of Non-Crystalline Solids - Volume 378, 15 October 2013, Pages 258-264
نویسندگان
D.J. Smythe, J.M. Brenan, N.R. Bennett, T. Regier, G.S. Henderson,