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Influence of additives on the properties of spherical nickel particles prepared by ultrasonic spray pyrolysis

Published online by Cambridge University Press:  31 January 2011

S. Stopić ,
J. Nedeljković ,
Z. Rakočević  and
D. Uskoković
S. Stopić
Affiliation:
Faculty of Technology and Metallurgy, Belgrade, Yugoslavia
J. Nedeljković
Affiliation:
Vinča Institute of Nuclear Sciences, Belgrade, Yugoslavia
Z. Rakočević
Affiliation:
Vinča Institute of Nuclear Sciences, Belgrade, Yugoslavia
D. Uskoković
Affiliation:
Institute of Technical Sciences, Serbian Academy of Sciences and Arts, Belgrade, Yugoslavia
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Abstract

Ideal spherical nonagglomerated Ni particles (mean diameter 0.62–1.12 μm) were prepared by ultrasonic spray pyrolysis of NiCl2 aqueous solution in the presence of 0.1 mass% of Pd, Cu, or Ni in an H2–N2 atmosphere at 900 °C. Incomplete reduction of the NiCl2 aqueous solution in the absence of additives was observed under the same conditions. Differential thermal and thermal-gravimetric analyses revealed a decrease in initial reduction temperature of NiCl2 from 375 to 275 °C by the addition of Pd, Cu, or Ni. The morphology of Ni particles was analyzed using scanning tunneling microscopy. The surface roughness of Ni particles was found to be controllable by addition of appropriate additives.

Type
Articles
Information
Journal of Materials Research , Volume 14 , Issue 7 , July 1999 , pp. 3059 - 3065
Copyright
Copyright © Materials Research Society 1999

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References

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