Journal of Materials Science

, Volume 35, Issue 4, pp 889–894 | Cite as

Effects of shear rate and particle concentration on rheological properties of magnetic particle suspensions

  • H. J. Choi
  • T. M. Kwon
  • M. S. Jhon

Abstract

Rheological characterizations were made for various types of magnetic particles (rod-like γ-Fe2O3, CrO2, and plate-like Ba-ferrite) and nonmagnetic (rod-like α-Fe2O3) suspensions, in terms of particle concentration and shear rate. Shear rate dependence on viscosity was accurately described by the Casson equation. The highest yield stress for Ba-ferrite among the four types of particles represents the sensitive flocculation characteristics of Ba-ferrite with respect to concentration. The effect of non-magnetic α-Fe2O3 and magnetic γ-Fe2O3 particle mixtures on suspension viscosity was also examined, and a negative deviation from the tie line of individual particle viscosities was observed.

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Copyright information

© Kluwer Academic Publishers 2000

Authors and Affiliations

  • H. J. Choi
    • 1
  • T. M. Kwon
    • 2
  • M. S. Jhon
    • 2
  1. 1.Department of Polymer Science and EngineeringInha UniversityInchonKorea
  2. 2.Department of Chemical EngineeringCarnegie Mellon UniversityPittsburghUSA

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