کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1461575 | 989620 | 2014 | 7 صفحه PDF | دانلود رایگان |

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.
Journal: Ceramics International - Volume 40, Issue 6, July 2014, Pages 8265–8271