کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9778135 | 1510572 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Raman and EPR studies of β-irradiated oxide glasses: The effect of iron concentration
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
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چکیده انگلیسی
The study of iron concentration effect on the oxide glass structure has shown evidence of depolymerization of the vitreous network with increasing iron content and especially with Fe2+ amount for all types of glass. For all glass compositions studied, we observe by EPR a blockage of defects creation processes under β irradiation for glasses doped with more than 1 wt% of Fe2O3. Reduction processes of Fe3+ under irradiation is also detected. Moreover for sodalime glass samples, β irradiation induces depolymerization, in opposite of what was expected and observed for other glasses. Anyway, adding iron up to 4 wt% Fe2O3 always diminishes the β irradiation effects. This has been linked to the observed iron reduction and to the ability of iron, maybe coupled with charge trapping processes to consume excitons.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Crystalline Solids - Volume 351, Issues 12â13, 1 May 2005, Pages 1061-1066
Journal: Journal of Non-Crystalline Solids - Volume 351, Issues 12â13, 1 May 2005, Pages 1061-1066
نویسندگان
F.Y. Olivier, B. Boizot, D. Ghaleb, G. Petite,