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HWAHAK KONGHAK,
Vol.35, No.6, 805-813, 1997
Vol.35, No.6, 805-813, 1997
Sol-Gel법에 의한 구형, 단분산 alumina분말의 제조
Preparation of Spherical, Monodispersed Alumina Particles by Sol-Gel Method
n-Octanol과 acetonitrile로 구성되어 있는 혼합용매 중에서 aluminum sec-butoxide(ASB)를 가수분해함에 의해 서브마이크론 크기의 단분산, 구형 alumina분말을 제조할 수 있었다. 이 과정 중 분말의 평균입경, 입도편차, 형상 등에 미치는 여러 실험변수들의 영향을 조사하였다. ASB농도가 증가함에 따라 평균입경 및 입도편차는 커지는 경향을 보였다. 반면에 물량의 증가는 평균입경 및 입도편차를 감소시켰다. 제조된 분말은 비정상질을 보였고, 1,000℃에서 2시간 열처리 후 α-alumina로 상전이되었다.
Monodispersed, spherical alumina powders with submicrometer size were prepared by the controlled hydrolysis of aluminum sec-butoxide(ASB) in a mixed solvent consisting of n-octanol and acetonitrile. The effects of various experimental variables on average particle size, particle size deviation and morphology were investigated. As ASB concentration increased, the average particle size and particle size deviation increased. On the other hand, the increase of water concentration decreased the average particle size and particle size deviation. Prepared powder showed an amorphous phase. It transformed to α-alumina by heat treatment at 1,000℃ for 2 hrs.
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[Cited By]
- Hwang UY, Lee SW, Lee JW, Park HS, Koo KK, Kim YR, Yoon HS, Yoo SJ, HWAHAK KONGHAK, 39(2), 199, 2001
- Hwang UY, Lee SW, Lee JW, Park HS, Koo KK, Yoo SJ, Yoon HS, Kim YR, HWAHAK KONGHAK, 39(2), 206, 2001
- Hwang UY, Lee SG, Koo KK, Park HS, Yoo SJ, Yoon HS, HWAHAK KONGHAK, 37(3), 355, 1999
- Lee CW, Hahm YM, HWAHAK KONGHAK, 36(6), 863, 1998
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