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Structural Development In Silica Systems
Published online by Cambridge University Press: 21 February 2011
Abstract
Results obtained with small angle neutron and X-ray scattering will be presented of systems with various silica concentrations. Silica gels with low silica concentration exhibit uniform mass fractal behaviour and after prolonged aging, dual mass fractal behaviour. A zeolite (silicalite) synthesis precursor gel with a high silica concentration was also investigated and was found to exhibit surface fractal behaviour. A model is presented, explaining the occurrence of dual fractality after prolonged aging. The change-over from mass fractal behaviour to surface fractal behaviour is explained, supported by scattering spectra calculated from simulated aggregate structures.
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- Copyright © Materials Research Society 1998
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