Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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The Effect of Preparation Conditions on the Characteristics of Co3O4 Particles Prepared by Spray Pyrolysis

합성 조건이 분무열분해 공정에 의해 합성되는 Co3O4 분말의 특성에 미치는 영향

  • Kim, Do-Youp (Department of Chemical Engineering, Konkuk University) ;
  • Ju, Seo-Hee (Department of Chemical Engineering, Konkuk University) ;
  • Koo, Hye-Young (Department of Chemical Engineering, Konkuk University) ;
  • Hong, Seung-Kwon (Department of Chemical Engineering, Konkuk University) ;
  • Kang, Yun-Chan (Department of Chemical Engineering, Konkuk University)
  • Published : 2006.01.27
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Abstract

[ $Co_3O_4$ ] particles with non-aggregation characteristics were prepared by various conditions such as preparation temperature, flow rate of carrier gas, and concentration of spray solution using spray pyrolysis. The morphology and crystallinity of the preformed particles obtained by spray pyrolysis at various conditions affected the mean size and morphology of the post-treated $Co_3O_4$ particles. The preformed particles with hollow and porous morphology obtained from spray solution with citric acid and ethylene glycol turned to $Co_3O_4$ particles with nano size, regular morphology and non-aggregation characteristics after post-treatment at $800^{\circ}C$. On the other hand, the preformed particles obtained by the preparation conditions of short residence time of particles inside hot wall reactor and high reactor temperature turned to $Co_3O_4$ particles with aggregated morphology after post-treatment. The mean crystallite size and particle size of the $Co_3O_4$ particles prepared from optimum preparation conditions were 47 nm and 210 nm at post-treatment temperature of $800^{\circ}C$.

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