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HomeMaterials Science ForumMaterials Science Forum Vols. 480-481Viscoelastic Properties of Ceria Gel

Viscoelastic Properties of Ceria Gel

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Abstract:

The viscoelastic behavior of different ceria gelling systems prepared through sol-gel transition were investigated by the rheological measurement. The gelation time was observed by the frequency independence of tand, and increased with increasing acid:alkoxide molar ratio. At the gel point, both storage and loss moduli (G’µ wn, G” µ wn)exhibited a power law dependence of applied frequency with n’ = n” = n. The viscoelastic exponents and gel strength parameter were dependent on the composition of system. The increase in HCl:alkoxide molar ratio increased the n value while decreased the S parameter.

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Periodical:

Materials Science Forum (Volumes 480-481)

Pages:

355-360

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.480-481.355

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Online since:

March 2005

Authors:

Nopphawan Phonthammachai, Morakot Rumruangwong, Sirirat Jitkanka, Erdogan Gulari, Alexander M. Jamieson, Sujitra Wongkasemjit

Keywords:

Ceria, Complex Viscosity, Sol-Gel Process, Viscoelastic Property

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© 2005 Trans Tech Publications Ltd. All Rights Reserved

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