Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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The Effect of Processing Conditions on the Gradient Pore Structure of Diatomite by Centrifugal Molding

경사 기공 구조를 가지는 규조토의 제조에 원심 분리 성형 공정 변수들이 미치는 영향

  • Ha, Jang-Hoon (Powder & Ceramics Division, Korea Institute of Materials Science) ;
  • Oh, Eun-Ji (Powder & Ceramics Division, Korea Institute of Materials Science) ;
  • Ahmad, Rizwan (Powder & Ceramics Division, Korea Institute of Materials Science) ;
  • Song, In-Hyuck (Powder & Ceramics Division, Korea Institute of Materials Science)
  • 하장훈 (한국기계연구원 부설 재료연구소, 분말/세라믹 연구 본부) ;
  • 오은지 (한국기계연구원 부설 재료연구소, 분말/세라믹 연구 본부) ;
  • ;
  • 송인혁 (한국기계연구원 부설 재료연구소, 분말/세라믹 연구 본부)
  • Received : 2012.05.31
  • Accepted : 2012.08.10
  • Published : 2012.08.28
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Abstract

The purpose of our study was to develop the fabrication method of porous diatomite ceramics with a porosity gradient by centrifugal molding. The processing variables of centrifugal molding were derived from Stoke's law of sedimentation, which were the radius of the particles, the acceleration due to centrifugal molding and the dynamic viscosity of the slurry. And these could be controlled by ball-milling conditions, centrifugal conditions, and the addition of methyl cellulose, respectively. The effects of processing conditions on the gradient pore structure of diatomite were investigated by particle size analysis, scanning electron microscope, and mercury porosimeter.

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References

  1. K. H. Kim, S. J. Cho, K. J. Yoon, J. J. Kim, J. Ha and D. I. I. Chun: J. Membr. Sci., 199 (2002) 69. https://doi.org/10.1016/S0376-7388(01)00679-2
  2. C.-H. Chen, K. Takita, S. Ishiguro, S. Honda and H. Awaji: J. Eur. Ceram. Soc., 25 (2005) 3257. https://doi.org/10.1016/j.jeurceramsoc.2004.08.019
  3. Y. Kinemuchi, K. Watari and S. Uchimura: Acta Mater., 51 (2003) 3225. https://doi.org/10.1016/S1359-6454(03)00143-5
  4. C. Falamaki and J. Veysizadeh: Ceram. Inter., 34 (2008) 1653. https://doi.org/10.1016/j.ceramint.2007.07.020
  5. D. Losic, J. G. Mitchell and N. H. Voelcker: Adv. Mat., 21 (2009) 2947. https://doi.org/10.1002/adma.200803778
  6. N. van Garderen, F. J. Clemens, M. Mezzomo, C. P. Bergmann and T. Graule: Appl. Clay Sci., 52 (2011) 115. https://doi.org/10.1016/j.clay.2011.02.008
  7. B. Michen, F. Meder, A. Rust, J. Fritsch, C. Aneziris and T. Graule: Environ. Sci. Technol., 46 (2012) 1170. https://doi.org/10.1021/es2030565
  8. N. van Garderen, F.J. Clemens, J. Kaufmann, M. Urbanek, M. Binkowski, T. Graule and C. G. Aneziris: Micropor. Mesopor. Mat., 151 (2012) 255. https://doi.org/10.1016/j.micromeso.2011.10.028
  9. G. K. Batchelor: An Introduction to Fluid Dynamics, Cambridge University Press, (1967) 233.