کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7901410 | 1510434 | 2015 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Efficient synthesis of SiOC glasses from ethane, ethylene, and acetylene-bridged polysilsesquioxanes
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Silicon oxycarbide glasses (SiOC-E1, E2, and E3) were obtained as black solids by hydrolysis/condensation polymerization (sol-gel process) of bis(triethoxysilyl)ethane (BTES-E1), -ethylene (BTES-E2), and -acetylene (BTES-E3), respectively, followed by pyrolysis of the resulting polysilsesquioxane gels (Gel-E1, E2, and E3) in a nitrogen atmosphere at 1000 °C. The pyrolytic reaction progresses were monitored by TGA, IR, and 13C and 29Si NMR spectroscopic analysis. Ceramic yields from the gels increased with the increase of the unsaturation degrees of the bridges, i.e. 87%, 90%, and 95% for gels Gel-E1, E2, and E3, respectively. Elemental compositions of the resulting glasses SiOC-E1, E2, and E3 were determined to be SiC0.70O1.60, SiC0.81O1.68, and SiC0.85O1.81, respectively by EPMA, indicating that the higher unsaturation of the organic bridge led to the higher carbon content.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Crystalline Solids - Volume 408, 15 January 2015, Pages 137-141
Journal: Journal of Non-Crystalline Solids - Volume 408, 15 January 2015, Pages 137-141
نویسندگان
Kazuki Yamamoto, Joji Ohshita, Tomonobu Mizumo, Toshinori Tsuru,