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Hétéroagglomération de suspensions céramiques : une étude numérique

Abstract : Heteroagglomeration in ceramic dilute suspensions composed of alumina and silica has been studied by means of two simulation methods : Brownian dynamics and global minimization. First, simulationswere applied to a system, inwhich alumina and silica particles have similar sizes. They allowed to analyze the composition and the structure of the agglomerates. Then, simulations were adapted to a second system, where the silica particles are sixteen times smaller than those of alumina. In this case, simulations showed that the silica particles adsorb on alumina and that the strongly charged alumina particles agglomerate via the silicawhich is placed between them. These agglomerates are very elongated although their equilibrium shapes are more compact. The experimental observations obtained in both systems are in agreement with the simulation results.
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Contributor : Martine Segear <>
Submitted on : Wednesday, December 3, 2008 - 3:20:21 PM
Last modification on : Thursday, November 5, 2020 - 9:06:02 AM
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  • HAL Id : tel-00344058, version 1



Manuella Cerbelaud. Hétéroagglomération de suspensions céramiques : une étude numérique. Matériaux. Université de Limoges, 2008. Français. ⟨tel-00344058⟩



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