کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7897628 | 1510119 | 2017 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Magnesiothermic reduction of silica glass substrate-Chemical states of silicon in the generated layers
ترجمه فارسی عنوان
کاهش مغناطیسی سدیم شیشه سیلیکا-وضعیت شیمیایی سیلیکون در لایه های تولید شده
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کلمات کلیدی
کاهش مغنسی گرمایی، شیشه سیلیکا، سیلیکون، سیلیسیم منیزیم، مونوکسید سیلیکون،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
چکیده انگلیسی
We applied magnesiothermic reduction to silica glass substrates at various conditions including solid state or solid-Mg liquid reaction, and solid-Mg vapor reaction. Magnesium silicide with highly oriented to the ã110ã direction against the substrate surface was obtained in the solid state reaction at temperatures from 600 °C to 700 °C using Mg grains while Si crystallites were obtained in the reaction with Mg film deposited on the glass substrate at 560 °C. On the other hand, in the reduction with Mg vapor at 575 °C, brown and amorphous layer was formed on the surface of the silica glass substrate. The layer was transparent in the visible and near-infrared regions, and showed an interference pattern in the transmission spectra, indicating the homogeneity of the layer. The thickness and refractive index were estimated as 770 nm and 1.94, respectively. As the reaction with Mg vapor proceeded further, Mg2Si and MgO crystallites were formed. Oxidation states and their depth profiles of silicon atoms in the layers were investigated by X-ray photoelectron spectroscopy. The silicon atoms in the brown and amorphous layer existed in intermediate oxidation states, â2 and +3. The reaction proceeding, the formal charge of the silicon atoms varied to â4 corresponding to Mg2Si and +2.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Asian Ceramic Societies - Volume 5, Issue 3, September 2017, Pages 341-349
Journal: Journal of Asian Ceramic Societies - Volume 5, Issue 3, September 2017, Pages 341-349
نویسندگان
Yuki Tsuboi, Shogo Ura, Katsumi Takahiro, Takashi Henmi, Arifumi Okada, Takashi Wakasugi, Kohei Kadono,