Pressure Filtration of Nanometer-sized SiC Powder

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  • TANAKA Yosuke
    Department of Advanced Nanostructured Materials Science and Technology, Kagoshima University
  • HIRATA Yoshihiro
    Department of Advanced Nanostructured Materials Science and Technology, Kagoshima University
  • MATSUNAGA Naoki
    Department of Applied Chemistry and Chemical Engineering, Kagoshima University
  • NAKAMURA Makoto
    Department of Advanced Nanostructured Materials Science and Technology, Kagoshima University
  • SAMESHIMA Soichiro
    Department of Advanced Nanostructured Materials Science and Technology, Kagoshima University
  • YOSHIDOME Toshifumi
    Department of Applied Chemistry and Chemical Engineering, Kagoshima University

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Abstract

Aqueous 5 vol% suspensions with 30 nm SiC particles at pH 7.0 were filtrated at a constant pressure of 0.1-10 MPa to form the compacts of 18-37% of theoretical density. The packing density became higher at a higher pressure. The filtration kinetics deviated from the filtration theory established for the suspension containing well dispersed particles. A new filtration model for a flocculated suspension was developed. The experimental results were well explained by the developed theory except for the final stage of consolidation. When the deformation ability of flocculated particles was reduced, the difference of the consolidation behavior between the experiment and the derived theory became larger.<br>

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