Fractal structure in base-catalyzed silica aerogels examined by TEM, SAXS and porosimetry |
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| Authors: | Yu I Aristov N Lisitsa V I Zaikovski J Lorenc and A B Jarzebski |
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| Institution: | (1) Federal Scientific Center, Boreskov Institute of Catalysis, 630090 Novosibirsk, Russia;(2) Institute of Chemical Engineering, 44-100 Gliwice, Poland |
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| Abstract: | A fractal analysis of three base catalyzed silica aerogels was performed using different experimental techniques: image analysis of electron micrographs, SAXS and study of pore size distribution determined from nitrogen adsorption isotherms. The aerogels appeared to exhibit self-similar properties over the range from 3–10 to 50–130 nm. The values of mass fractal dimension varied from 1.75 to 2.05 depending on the reactants concentration (TEOS, H2O) and were found to be similar irrespective of the method applied. |
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| Keywords: | Disperse systems aerogels pore structure fractals |
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