کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5467529 | 1518616 | 2017 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Aluminosilicate glasses structure under electron irradiation: An EPR study
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سطوح، پوششها و فیلمها
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چکیده انگلیسی
To understand the complex oxide glasses behavior under irradiation, 13 simplified aluminosilicate glasses were elaborated, composed of SiO2, Al2O3, Na2O and CaO oxides, which were distributed in 3 series to investigate the influence of Na2O/CaO, Al2O3/SiO2 ratios and Al2O3 content. 2.5Â MeV Electron irradiations were performed to obtain bulk irradiated samples by electronic collisions at low stopping power. The influence of dose (from 1.105 up to 4.109Â Gy) and chemical composition on the formation of paramagnetic centers have been investigated by electron paramagnetic resonance (EPR) spectroscopy. It has shown that electronic collisions induce production of mainly 3 types of point defects (OHC, Al-OHC, E') in the glassy network, whose content increase up to 1Â GGy. The production efficiency of Al-OHC defects is increased when the calcium cations are in charge compensator role around aluminum cations instead of sodium cations. A significant decrease of defects concentration was observed between 1 and 4Â GGy for all studied glasses.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 407, 15 September 2017, Pages 203-209
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 407, 15 September 2017, Pages 203-209
نویسندگان
A. Le Gac, B. Boizot, C. Jégou, S. Peuget,