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Consolidation behavior of flocculated alumina suspensions
YKI – Ytkemiska institutet.
1992 (English)In: Journal of The American Ceramic Society, ISSN 0002-7820, E-ISSN 1551-2916, Vol. 75, 3305-3314 p.Article in journal (Refereed)
Abstract [en]

The consolidation behavior of flocculated alumina suspensions was analyzed as a function of the interparticle energy. Consolidation was performed by a centrifugal force field or by gravity and both the time dependent and equilibrium density profiles were measured by a gamma ray absorption technique. The interparticle energy at contact was controlled by adsorbing fatty acids of varying molecular weight at the alumina/decalin interface. We found that strongly attractive interactions result in a particle network which resists consolidation and shows compressible behavior over a large stress range. The most weakly flocculated suspension showed an essentially incompressible, homogeneous density profile after consolidation at different centrifugal speeds. We also found a significant variation in the maximum volume fraction, m, obtained, with m 0.54 for the most strongly flocculated suspension to m 0.63 for the most weakly flocculated suspension. The compressive yield stresses show a behavior which can be fitted to a modified power law. In this paper, we discuss possible correlations between the fitting parameters and physical properties of the flocculated suspensions.

Place, publisher, year, edition, pages
1992. Vol. 75, 3305-3314 p.
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-26623OAI: oai:DiVA.org:ri-26623DiVA: diva2:1053626
Note
A752Available from: 2016-12-08 Created: 2016-12-08Bibliographically approved

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