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Production of Metal Nanopowders by Sonoelectrochemistry

Published online by Cambridge University Press:  15 February 2011

J.-L. Delplancke ,
V. Di Bella ,
J. Reisse  and
R. Winand
J.-L. Delplancke
Affiliation:
Metallurgy - Electrochemistry Department, CP165
V. Di Bella
Affiliation:
Metallurgy - Electrochemistry Department, CP165
J. Reisse
Affiliation:
Organic Chemistry, CP165 Université Libre de Bruxelles, 50 Avenue F.D. Roosevelt, B-1050 Bruxelles, Belgium
R. Winand
Affiliation:
Metallurgy - Electrochemistry Department, CP165
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Abstract

Metal powders with a diameter ranging from 20 to 50 micrometers are currently produced by electrolysis at high current density in aqueous electrolytes. A lot of research is then devoted to produce by electrolysis and with a high yield, ultrafine metal powders. Two main techniques are actually developed: strong electrolyte stirring and pulsed currents in order to obtain high current densities and accordingly, high nucleation rates and small nuclei diameters. By combining pulsed current and pulsed ultrasound on the same electrode surface, it has been possible to produce by electrolysis, with a yield ranging from 80 to 95%, crystalline metal powders with a sharp diameter distribution around 100nm. Possible explanations of these results are presented. This new technique, called sonoelectrochemistry, is illustrated by metal powders analysed by HIRTEM, X-ray diffraction and laser diffusion. The perspectives of sonoelectrochemistry for the production of metal or ceramic nanopowders are studied.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 372: Symposium W1 – Hollow and Solid Spheres and Microspheres--Science and Technology , 1994 , 75
Copyright
Copyright © Materials Research Society 1995

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