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 μm were synthesized by a new liquid reduction method in 0.3M cobalt sulfate and 1.5M hydrazine-0.6M sodium hypophosphite mixture at 333K.

• 김대원(㈜미산) | Dae Weon Kim
• 김지훈(㈜미산) | Ji-Hoon Kim
• 최요한(㈜미산) | Yo-Han Choi
• 최희락(부경대학교 재료공학과) | Hee Lack Choi
• 윤진호(고등기술연구원 신소재공정센터) | Jin-Ho Yoon Corresponding Author