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Average cluster sizes and cluster size distributions of superfine nickel particles in light media

  • Jing-sheng Li (李敬生)Email author
  • Fei-hu Du (杜飞虎)
  • Juan Wang (王娟)
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Abstract

Effects of shear rates on average cluster sizes (ACSs) and cluster size distributions (CSDs) in uni- and bi-systems of partly charged superfine nickel particles were investigated by Brownian dynamics, and clustering properties in these systems were compared with those in non-polar systems. The results show that the ACSs in bi-polar systems are larger than those in the non-polar systems. In uni-polar systems the behavior of clustering property differs: at the lower ionic concentration (10%), repulsive force is not strong enough to break clusters, but may greatly weaken them. The clusters are eventually cracked into smaller ones only when concentration of uni-polar charged particles is large enough. In this work, the ionic concentration is 20%. The relationship between ACS and shear rates follows power law in a exponent range of 0.176–0.276. This range is in a good agreement with the range of experimental data, but it is biased towards the lower limit slightly.

Key words

ionic concentration average cluster sizes cluster size distribution power law 

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Copyright information

© Central South University Press and Springer-Verlag GmbH 2009

Authors and Affiliations

  • Jing-sheng Li (李敬生)
    • 1
    Email author
  • Fei-hu Du (杜飞虎)
    • 1
  • Juan Wang (王娟)
    • 1
  1. 1.School of Chemistry and Chemical EngineeringJiangsu UniversityZhenjiangChina

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