Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Synthesis of Fine Copper Powders from CuO-H2O Slurry by Wet-reduction Method

액상환원법에 의한 CuO-H2O 슬러리로부터 미세 구리분말의 제조

  • Ahn Jong-Gwan (Division of Materials Utilization, Korea Institute of Geoscience and Mineral Resources) ;
  • Kim Dong-Jin (Division of Materials Utilization, Korea Institute of Geoscience and Mineral Resources) ;
  • Lee Ik-Kyu (Division of Materials Utilization, Korea Institute of Geoscience and Mineral Resources) ;
  • Lee Jaeryeung (Division of Materials Utilization, Korea Institute of Geoscience and Mineral Resources) ;
  • Huanzhen Liang (Institute of Process Engineering, Chinese Academy of Sciences)
  • 안종관 (한국지질자원연구원, 자원활용소재연구부) ;
  • 김동진 (한국지질자원연구원, 자원활용소재연구부) ;
  • 이익규 (한국지질자원연구원, 자원활용소재연구부) ;
  • 이재령 (한국지질자원연구원, 자원활용소재연구부) ;
  • 양환진 (중국과학원, 공정연구소)
  • Published : 2005.06.01
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Abstract

Ultrafine copper powder was prepared from $CuO-H_2O$ slurry with hydrazine, a reductant, under $70^{\circ}C$. The influence of various reaction parameters such as temperature, reaction time, molar ratio of $N_2H_4$, PvP and NaOH to Cu in aqueous solution had been studied on the morphology and powder phase of Cu powders obtained. The production ratio of Cu from CuO was increased with the ratio of $N_2H_4/Cu$ and the temperature. When the ratio of $N_2H_4/Cu$ was higher than 2.5 and the temperature was higher than $60^{\circ}C$, CuO was completely reduced into Cu within 40 min. The crystalline size of Cu obtained became fine as the temperature increase, whereas the aggregation degree of particles was increased with the reaction time. The morphology of Cu powder depended on that of the precursor of CuO and processing conditions. The average particle size was about $0.5{\mu}m$.

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