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http://dx.doi.org/10.4150/KPMI.2015.22.4.260

Preparation of Spherical Cobalt Fine Powders by New Liquid Reduction Method  

Kim, Dae Weon (Misan Co. Ltd.)
Kim, Ji-Hoon (Misan Co. Ltd.)
Choi, Yo-Han (Misan Co. Ltd.)
Choi, Hee Lack (Dept. of Materials System Engineering, Pukyong National University)
Yoon, Jin-Ho (Advanced Materials & Processing Center, Institute for Advanced Engineering)
Publication Information
Journal of Powder Materials / v.22, no.4, 2015 , pp. 260-265 More about this Journal
Abstract
Spherical fine cobalt powders were fabricated by new liquid reduction method. Commercial cobalt sufate heptahydrate was used as raw material. Also ethylene glycol was used as solvent and hydrazine-sodium hypophosphite mixture was used as reduction agent for the new liquid reduction method. A plate shaped cobalt powders with an approximately 300 nm were prepared by a traditional wet ruduction method using distilled water as solvent and hydrazine. Spherical fine cobalt powders with an average size of $1-3{\mu}m$ were synthesized by a new liquid reduction method in 0.3M cobalt sulfate and 1.5M hydrazine-0.6M sodium hypophosphite mixture at 333K.
Keywords
Spherical cobalt; Liquid reduction; Hydrazine; Particle size;
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Times Cited By KSCI : 2  (Citation Analysis)
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