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| Effect of SiO2 Addition on the Properties of Fe2O3-SiO2 Binary Composite Xerogels |
| GAO Kun, LUO Yunjun, LI Guoping, WANG Lu, CHEN Renjie, LI Nianke |
| State Key Laboratory of Prevention and Control of Explosion Disasters, Beijing Institute of Technology, Beijing 100081 |
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Cite this article:
GAO Kun LUO Yunjun LI Guoping WANG Lu CHEN Renjie LI Nianke. Effect of SiO2 Addition on the Properties of Fe2O3-SiO2 Binary Composite Xerogels. Chin J Mater Res, 2011, 25(5): 464-468.
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Abstract The iron oxide–based Fe2O3–SiO2 binary composite xerogels were prepared by sol-gel and freeze-drying method using FeCl3·6H2O and TEOS as precursors. The pore structure and specific surface area of the binary xerogels were investigated by means of nitrogen adsorption experiments, FT–IR spectroscopy and SEM. The results show that the specific surface area and the pore volume increase with the silica content, which is caused by Fe–O–Si bonds formed in the binary xerogels. The addition of SiO2 improves the specific area and pore structure of the binary composite xerogels. These will provide a basis for their application in the nano–thermite.
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Received: 28 June 2011
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| Fund: Supported by National Natural Science Foundation of China No.10876004 and the State Key Laboratory Foundation No.YBKT11–01. |
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