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Consolidation behavior of flocculated alumina suspensions
YKI – Ytkemiska institutet.
1992 (engelsk)Inngår i: Journal of The American Ceramic Society, ISSN 0002-7820, E-ISSN 1551-2916, Vol. 75, s. 3305-3314Artikkel i tidsskrift (Fagfellevurdert)
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.

sted, utgiver, år, opplag, sider
1992. Vol. 75, s. 3305-3314
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Identifikatorer
URN: urn:nbn:se:ri:diva-26623OAI: oai:DiVA.org:ri-26623DiVA, id: diva2:1053626
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A752Tilgjengelig fra: 2016-12-08 Laget: 2016-12-08 Sist oppdatert: 2017-11-29bibliografisk kontrollert

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