Dispersion of Nanoparticles in Water Using a High Pressure Wet-type Jet Mill

DOI Web Site Web Site 2 Citations 14 References
  • TANAKA Kuniaki
    Wet Jet Mill Design Section, Plant Equipment Department, Sugino Machine Limited Department of Chemical Process Engineering and Faculty of Engineering, Toyama University
  • KUMAZAWA Hidehiro
    Department of Chemical Process Engineering and Faculty of Engineering, Toyama University

Bibliographic Information

Other Title
  • 高圧湿式ジェットミルを用いたナノ粒子の水中への分散
  • コウアツ シッシキ ジェットミル オ モチイタ ナノ リュウシ ノ スイチュウ エ ノ ブンサン

Search this article

Description

The quality of dispersion of nanoparticles, which agglomerate strongly, greatly influences the processing process and the quality of final products such as sintered bodies. Therefore, the technology of nanoparticle dispersion is considered as an important element in industry.<BR>In the present work, aqueous suspensions of nanoparticles were produced by a high pressure wet-type jet mill, using SiO2 (primary particle diameter: about 20 nm) and Al2O3 (primary particle diameter: about 13 nm) as dispersed particles. The effects of the operating conditions on the mean size of particles, and the relation of the mean particle size to aqueous suspension viscosity were examined.<BR>The volumetric mean diameter (dv) decreased with increasing processing pressure (P), number of passages (N) and concentration of particles (C), but did not decrease to the primary particle size. The agglomerated particle size was 5.9-7.4 and 6.5-8.1 times the primary particle size for SiO2 and Al2O3, respectively. Therefore, dispersion became increasingly difficult as primary particle size decreased. For all the present experimental conditions, the relationship between dv and the energy dissipation rate (ε) could be expressed by a straight line with a slope of −0.03 on logarithmic paper. Aqueous suspensions of both types of particles exhibited plastic behavior at N=0, and pseudo-plastic behavior at N≥1. Furthermore, the pseudo-plasticity decreased with increasing N, and at N≥10 the aqueous suspensions apparently exhibited Newtonian behavior.

Journal

Citations (2)*help

See more

References(14)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top