Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Preparation of Nanocrystalline ZnO Ultrafine Powder Using Ultrasonic Spraying Combustion Method

초음파분무 연소법에 의한 나노결정 ZnO 초미분체 제조

  • Kim, Kwang-Su (Department of Materials and Metallic Engineering, Chosun University, BK21) ;
  • Hwang, Du-Sun (Department of Nano Sci. & Tech. / Sejong Advanced Institute of Nano Technologies, Sejong University) ;
  • Ku, Suk-Kyeon (Department of Nano Sci. & Tech. / Sejong Advanced Institute of Nano Technologies, Sejong University) ;
  • Lee, Kang (Department of Nano Sci. & Tech. / Sejong Advanced Institute of Nano Technologies, Sejong University) ;
  • Jeon, Chi-Jung (AMT Technology Co. Ltd) ;
  • Lee, Eun-Gu (Department of Materials and Metallic Engineering, Chosun University, BK21) ;
  • Kim, Sun-Jae (Department of Nano Sci. & Tech. / Sejong Advanced Institute of Nano Technologies, Sejong University)
  • 김광수 (조선대학교 재료공학과) ;
  • 황두선 (세종대학교 나노공학과/나노기술연구소) ;
  • 구숙경 (세종대학교 나노공학과/나노기술연구소) ;
  • 이강 (세종대학교 나노공학과/나노기술연구소) ;
  • 전치중 ((주)에이엠티기술) ;
  • 이은구 (조선대학교 재료공학과) ;
  • 김선재 (세종대학교 나노공학과/나노기술연구소)
  • Published : 2002.10.01
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Abstract

For mass product of nanocrystalline ZnO ultrafine powders, self-sustaining combustion process(SCP) and ultrasonic spray combustion method(USCM) were applied at the same time. Ultrasonic spray gun was attached on top of the vertical type furnace. The droplet was sprayed into reaction zone of the furnace to form SCP which produces spherical shape with soft agglomerate crystalline ZnO particles. To characterize formed particles, fuel and oxidizing agent for SCP were used glycine and zinc nitrate or zinc hydroxide. Respectively, with changing combustion temperature and mixture ratio of oxidizing agent and fuel, the best ultrasonic spray conditions were obtained. To observe ultrasonic spray effect, two types of powder synthesis processes were compared. One was directly sprayed into furnace from the precursor solution (Type A), the other directly was heated on the hot plate without using spray gun (Type B). Powder obtained by type A was porous sponge shape with heavy agglomeration, but powder obtained using type B was finer primary particle size, spherical shape with weak agglomeration and bigger value of specific surface area. 9/ This can be due to much lower reaction temperature of type B at ignition time than type A. Synthesized nanocrystalline ZnO powders at the best ultrasonic spray conditions have primary particle size in range 20~30nm and specific surface area is about 20m$^2$/g.

Keywords

References

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