Proceedings of the Korea Association of Crystal Growth Conference (한국결정성장학회:학술대회논문집)

The Korea Association of Crystal Growth (한국결정성장학회)
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Preparation of Fine Co Powder from Co(OH)2 Slurry by Hydrothermal Reduction with Hydrogen

  • Kening Yu (Institute of Chemical Metallurgy, Chinese Academy of Sciences, Beijing 100080 China) ;
  • Kim, Dong J. (Korea Institute of Geology, Mining and Materials, Taejeon, 305-350) ;
  • Hun S. Chung (Korea Institute of Geology, Mining and Materials, Taejeon, 305-350)
  • Published : 1996.06.01
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Abstract

The fine Co powder with an average particle sie of less than 1$\mu\textrm{m}$ was prepared by hydrothermal reduction with hydrogen from Co(OH)2 slurry obtained by mixing the solutons of CoSO4$.$7H2O and NaOH. A method to control pH of the end solution around neutrality was proposed. The reduction rate was found to be a function of pH, temperature, hydrogen pressure and the amount of catalyst.

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