Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Preparation of Asymmetric Ceramic Membrane by Coating-Pyrolysis Process

도포-열분해법을 이용한 비대칭 세라믹 분리막 제조

  • Ryu, Hyun-Wook (Department of Ceramic Engineering, Chonnam National University) ;
  • Kim, Byung-Hoon (Department of Ceramic Engineering, Chonnam National University)
  • 류현욱 (전남대학교 신소재공학부) ;
  • 김병훈 (전남대학교 신소재공학부)
  • Published : 2002.01.01
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Abstract

The fabrication of a three-layered asymmetric ceramic membrane was performed by slip casting of the porous alumina support and dip coating of the alumina intermediate layer using high purity ${\alpha}-Al_2O_3$ powders that have different particle size, followed by screen printing-pyrolysis of the $Tio_2$ layer as an ultrafilteration membrane using Ti-naphthenate solution. The bending strength, porosity and mean pore size of the alumina support were 231 kg/$cm^2$s, 30.26% and 0.19 ${mu}m$, respectively. The thickness of the intermediate layer was 30 ${mu}m$ and the mean pore size of that was 0.063 ${mu}m$. Also, the top layer was 0.5 ${mu}m$ thick and micropores with about 20 nm size were formed uniformly.

입도가 다른 두 가지 고순도 ${\alpha}-Al_2O_3$ 분말을 이용하여 slip casting법과 담금코팅(dip coating)법으로 다공질 알루미나 지지체와 중간층을 각각 제조하였으며, 그 위에 분리막인 산화티탄($Tio_2$)층을 Ti-naphthenate용액으로 screen printing한 후 열분해시켜 형성시킴으로써, 3층 구조의 비대칭성 세라믹 분리막을 제조하였다. 알루미나 지지체의 곡강도, 기공율 및 평균 기공크기는 각각 231 Kg/$cm^2$, 30.26%, 0.19 ${mu}m$였으며, 중간층은 두께가 약 30 ${mu}m$, 평균 기공크기가 0.063 ${mu}m$였다. 또한 최상층 $Tio_2$ 분리막은 그 두께가 약 0.5 ${mu}m$였으며 평균 약 20 nm 정도의 미세 기공들이 매우 균일하게 형성되어 있었다.

Keywords

References

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