کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1461575 989620 2014 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation of monolith SiC aerogel with high surface area and large pore volume and the structural evolution during the preparation
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Preparation of monolith SiC aerogel with high surface area and large pore volume and the structural evolution during the preparation
چکیده انگلیسی

Resorcinol–formaldehyde/silica composite (RF/SiO2) aerogel was synthesized by sol–gel process followed by supercritical drying (SCD). Monolithic SiC aerogel was obtained from RF/SiO2 aerogel after carbothermal reduction. The evolution of physical property, crystal structure, morphology and pore structure from RF/SiO2 to SiC aerogel was investigated by different methods, such as X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM) and N2 adsorption/desorption. The as-synthesized SiC aerogel presented typical mesoporous structure and possessed high porosity (91.8%), high surface area (328 m2/g) and large pore volume (2.28 cm3/g). Carbothermal reduction mechanism was also discussed based on the experiment and characterization results.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 40, Issue 6, July 2014, Pages 8265–8271
نویسندگان
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