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Hydrodynamic cavitation as a tool to control macro-, micro-, and nano-properties of inorganic materials

Published online by Cambridge University Press:  31 January 2011

J. Find ,
S.C. Emerson ,
I.M. Krausz  and
W.R. Moser
J. Find
Affiliation:
Department of Chemical Engineering, Worcester Polytechnic Institute, Worcester, Massachusetts 01609
S.C. Emerson
Affiliation:
Department of Chemical Engineering, Worcester Polytechnic Institute, Worcester, Massachusetts 01609
I.M. Krausz
Affiliation:
Department of Chemical Engineering, Worcester Polytechnic Institute, Worcester, Massachusetts 01609
W.R. Moser*
Affiliation:
Department of Chemical Engineering, Worcester Polytechnic Institute, Worcester, Massachusetts 01609
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Hydrodynamic cavitation was shown to be a powerful tool for the synthesis of nanostructured catalysts, ceramics, and piezoelectrics in high phase purities. The macro-, micro-, and nano- properties of solid-state materials could be controlled through adjusting the cavitational regime during synthesis by simple mechanical adjustment. The synthesis of nanostructured titania, piezoelectrics, perovskites, supported and unsupported cobalt molybdates, and Pd and Ag supported on alumina illustrate changes in morphology and size of crystals, growth in a preferred orientation of crystallites, and control of crystallographic strain and size compared to classically prepared materials. The high shear and cavitational forces during synthesis induce micro-strain into the materials and are a function of the Reynolds and cavitation numbers.

Type
Articles
Information
Journal of Materials Research , Volume 16 , Issue 12 , December 2001 , pp. 3503 - 3513
Copyright
Copyright © Materials Research Society 2001

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