Effect of reaction time on formation of CoNi particles prepared via the polyol method

Young Min Lee, G. W. Qin, Chan Gyu Lee, Bon Heun Koo, Kew Yul Moon, Y. Shimada, O. Kitakami

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


CoNi alloy particles were synthesized via the polyol process. Variations of the lattice constant, the mean size and composition, and the magnetic properties as functions of reaction time were evaluated by using X-ray diffractometry, field emission scanning electron microscopy, and vibrating sample magnetometer, respectively. The mean size of the obtained CoNi particles did not change from about 500 nm for up to 2 h of reaction time but increased to about 700 nm at a reaction time of 4 h. It was found that the Co composition of the CoNi alloy decreased as the reaction time increased at 180°C. This indicates that the reduction of Co2+ is easier than that of Ni 2+. The magnetic properties showed that the CoNi alloy particles are typical soft magnetic materials.

Original languageEnglish
Pages (from-to)207-210
Number of pages4
JournalMetals and Materials International
Issue number3
Publication statusPublished - 2007 Jun
Externally publishedYes


  • CoNi alloy particles
  • Polyol process
  • Reaction time
  • VSM
  • XRD

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry


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