A Chemical Route to Large-Scale Preparation of Spherical and Monodisperse Ni Powders

A facile chemical route to prepare a well‐defined Ni powder on a mass‐production scale without external heating was suggested. A highly concentrated Ni complex was formed between NiCl2 and N2H4 solution, and subsequent addition of NaOH solution triggered serial reactions from the Ni complex decompos...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 2005-11, Vol.88 (11), p.3020-3023
Main Authors: Choi, Jae-Young, Lee, Yong-Kyun, Yoon, Seon-Mi, Lee, Hyun Chul, Kim, Byung-Ki, Kim, Jong Min, Kim, Kang-Min, Lee, Jong-Heun
Format: Article
Language:English
Subjects:
Applied sciences
Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Heating
Materials science
Metals. Metallurgy
Nanostructured ceramics
Nickel alloys
Powders
Temperature effects
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Summary:A facile chemical route to prepare a well‐defined Ni powder on a mass‐production scale without external heating was suggested. A highly concentrated Ni complex was formed between NiCl2 and N2H4 solution, and subsequent addition of NaOH solution triggered serial reactions from the Ni complex decomposition via Ni(OH)2 formation to the reduction of a Ni(OH)2 gel into well‐defined Ni spheres. The high temperature necessary for the reaction was attained not by external heating but by exothermic reactions such as complex formation and reduction. The preparation of monodisperse and spherical Ni powder was attributed to uniform distribution of the reducing agent (N2H4) within the Ni(OH)2 gel.
ISSN:0002-7820
1551-2916
DOI:10.1111/j.1551-2916.2005.00582.x