Using the ultrasonic pyrolysis method, spherical SiO2 powders were synthesized from aqueous SiO2 sol as a starting material. The effects of pyrolysis conditions such as reaction temperature, SiO2 sol concentration, and physical properties of precursor were investigated for the morphologies of the resulting SiO2 powders. The particle size, shape, and crystallite size of the synthesized SiO2 powders were demonstrated according to the pyrolysis conditions. Generally, the synthesized SiO2 particles were amorphous phase and showed spherical morphology with a smooth surface. It was revealed that increased crystallite size and decreased spherical SiO2 particle size were obtained with increases of the pyrolysis reaction temperature. Also, quantity of spherical SiO2 particles decreased with the decrease in the concentration and surface tension of the precursor.

1. 서 론
 2. 실험 방법
 3. 결과 및 고찰
  3.1 열분해 반응온도의 영향
  3.2 전구체 용액 농도의 영향
  3.3 전구체 용액 물리특성의 영향
 4. 결 론
 References

• 이지현(한국세라믹기술원 도자세라믹센터, 인하대학교 신소재공학과) | Ji-Hyeon Lee
• 황해진(인하대학교 신소재공학과) | Hae-Jin Hwang
• 한규성(한국세라믹기술원 도자세라믹센터) | Kyu-Sung Han Corresponding author
• 황광택(한국세라믹기술원 도자세라믹센터) | Kwang-Taek Hwang
• 김진호(한국세라믹기술원 도자세라믹센터) | Jin-Ho Kim