Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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The Characteristics of Nano-sized Cobalt Oxide Particles Prepared by Low Pressure Spray Pyrolysis

저압 분무열분해법에 의해 합성된 나노 크기의 코발트 산화물 입자의 특성

  • Ju, Seo-Hee (Department of Chemical Engineering, Konkuk University) ;
  • Kim, Do-Youp (Department of Chemical Engineering, Konkuk University) ;
  • Kang, Yun-Chan (Department of Chemical Engineering, Konkuk University)
  • Published : 2006.09.27
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Abstract

Nano-sized cobalt oxide powders were prepared by low pressure spray pyrolysis process. The precursor powders obtained by low pressure spray pyrolysis process from the spray solution with ethylene glycol had several microns size and hollow structure. The precursor powders obtained from the spray solution with optimum concentration of ethylene glycol formed the nano-sized cobalt oxide powders with regular morphology after post-treatment without milling process. On the other hand, the cobalt oxide powders obtained from the spray solution without ethylene glycol had submicron size and spherical shape before and after posttreatment. The mean size of the cobalt oxide powders formed from the spray solution with concentration of ethylene glycol of 0.7M was 180 nm after post-treatment at temperature of $800^{\circ}C$. The mean size of the powders could be controlled from several tens nanometer to micron sizes by changing the post-treatment temperatures in the preparation of cobalt oxide powders by low pressure spray pyrolysis process.

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