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Precipitation of Uniform Particles: The Role of Aggregation

Published online by Cambridge University Press:  28 February 2011

C.F. Zukoski ,
M. K. Chow ,
G.H. Bogush  and
J-L. Look
C.F. Zukoski
Affiliation:
Department of Chemical Engineering, University of Ilinois, Urbana, II 61801
M. K. Chow
Affiliation:
Department of Chemical Engineering, University of Ilinois, Urbana, II 61801
G.H. Bogush
Affiliation:
Department of Chemical Engineering, University of Ilinois, Urbana, II 61801
J-L. Look
Affiliation:
Department of Chemical Engineering, University of Ilinois, Urbana, II 61801
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Extract

The conventional mechanism developed by LaMer (1) is often considered as the most relevant model for describing the precipitation of uniform particles. In this model, the concentration of a species is slowly increased above its equilibrium value until a critical concentration is reached and nucleation occurs. The resulting particles consume soluble species and the supersaturation level is reduced until there is a balance between particle growth and the generation of reactive species. At this point nucleation stops. Particle growth then continues by molecular addition of soluble species to the growing particles. Uniformity is achieved through a short nucleation time and a particle growth mechanism where the small particles grow more rapidly than the large particles.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 180: Symposium A – Better Ceramics Through Chemistry IV , 1990 , 131
Copyright
Copyright © Materials Research Society 1990

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References

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