Citation: YI Xi-Bin, WANG Xiu-Chun, ZHANG Jing, MA Jie, LIU Shuo, SHEN Xiao-Dong, CUI Sheng. Synthesis and Characterization of SiO2 Composite Aerogels Enhanced by the Self Growing Nano-Fibers[J]. Chinese Journal of Inorganic Chemistry, ;2014, 30(3): 603-608. doi: 10.11862/CJIC.2014.103
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The SiO2 composite aerogels enhanced by the self growing nano-fibers were prepared using sol-gel techniques and supercritical fluid drying, and converted to the high-strength composite aerogels after 1 200 ℃ high temperature heat treatment process. The structures and properties of composite aerogels were analyzed by means of SEM, TEM, XRD, TG, BET, and the compressive strengths and the true density were also measured. The experimental results showed that the as-synthesized ZrOX/SiO2 composite aerogels exhibited well-proportioned multihole network structure, and the Zirconium oxide nano-fibers alternated in the composite aerogels by the chemical bond. The mechanical strength and the insulation properties were improved evidently. The specific surface area, the compressive strengths and the true density of the ZrOX/SiO2 composite aerogels after 1 200 ℃ high temperature heat treatment process were 827.22 m2·g-1, 9.68 MPa, 0.23 g·cm-3, respectively.
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