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Precipitation of Monodisperse Ceramic Particles; Theoretical Models

Published online by Cambridge University Press:  28 February 2011

Paul Calvert
Paul Calvert*
Affiliation:
University of Sussex, Brighton, BNl 9QJ, England. and Ceramics Processing Research Laboratory, Massachusetts Institute of Technology, Cambridge, MA 02139
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Abstract

Monodisperse ceramic powders with sizes in the range of 0.1-μm have been prepared by a number of groups. Generally a dilute solution of a metal compound is hydrolysed to produce amorphous, spherical particles which may be crystallized by subsequent heat treatments. Emulsion polymerization can produce similarly monodisperse latices if the polymerization conditions are carefully controlled. This paper discusses models of the precipitation process which are based on crystallization from aqueous solutions but are believed to be more generally applicable. From simulations it is concluded that monodisperse particles are a most unlikely outcome of a batch precipitation process. Surface active compounds could play an important role in controlling particle size. Inhomogenous mixing during the early stages of reaction should also be important.

Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 73: Symposium H – Better Ceramics Through Chemistry II , 1986 , 79
Copyright
Copyright © Materials Research Society 1986

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References

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