Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Fabrication of Spherical SiO2 Powders from Aqueous SiO2 Sol via Ultrasonic Pyrolysis

초음파 분무 열분해 공정을 이용한 수계 SiO2 Sol로부터의 구형 SiO2 분말 합성

  • Lee, Ji-Hyeon (Ceramic ware Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Hwang, Hae-Jin (Division of Material Science and Engineering, Inha University) ;
  • Han, Kyu-Sung (Ceramic ware Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Hwang, Kwang-Taek (Ceramic ware Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Kim, Jin-Ho (Ceramic ware Center, Korea Institute of Ceramic Engineering and Technology)
  • 이지현 (한국세라믹기술원 도자세라믹센터) ;
  • 황해진 (인하대학교 신소재공학과) ;
  • 한규성 (한국세라믹기술원 도자세라믹센터) ;
  • 황광택 (한국세라믹기술원 도자세라믹센터) ;
  • 김진호 (한국세라믹기술원 도자세라믹센터)
  • Received : 2016.08.19
  • Accepted : 2016.09.13
  • Published : 2016.10.27
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Abstract

Using the ultrasonic pyrolysis method, spherical $SiO_2$ powders were synthesized from aqueous $SiO_2$ sol as a starting material. The effects of pyrolysis conditions such as reaction temperature, $SiO_2$ sol concentration, and physical properties of precursor were investigated for the morphologies of the resulting $SiO_2$ powders. The particle size, shape, and crystallite size of the synthesized $SiO_2$ powders were demonstrated according to the pyrolysis conditions. Generally, the synthesized $SiO_2$ particles were amorphous phase and showed spherical morphology with a smooth surface. It was revealed that increased crystallite size and decreased spherical $SiO_2$ particle size were obtained with increases of the pyrolysis reaction temperature. Also, quantity of spherical $SiO_2$ particles decreased with the decrease in the concentration and surface tension of the precursor.

Keywords

References

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