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Consolidation Behavior of Flocculated Alumina Suspensions Lennart Bergstrom,*~+Christopher H. Schilling,*,iand Ilhan A. Aksay*,+
 

Summary: Consolidation Behavior of Flocculated Alumina Suspensions
Lennart Bergstrom,*~+Christopher H. Schilling,*,iand Ilhan A. Aksay*,+
98195
99352
Department of Materials Science and Engineering, LJniversity of Washington, Seattle, Washington
Pacific Northwest Laboratory, Richland, Washington
The consolidation behavior of flocculated alumina suspen-
sions has been 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 equi-
librium density profiles were measured by a gamma-ray
absorption technique. The interparticle energy at contact
was controlled by adsorbing fatty acids of varying rnolecu-
lar weight at the aluminddecalin interface. We found that
strongly attractive interactions result in a particle network
which resists consolidation and shows compressible behav-
ior over a large stress range. The most weakly flocculated
suspension showed an essentially incompressible, homoge-
neous density profileafter consolidation at different centrif-
ugal speeds. We also found a significant variation in the

  

Source: Aksay, Ilhan A. - Department of Chemical Engineering, Princeton University

 

Collections: Materials Science