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

被引:56
作者
Choi, HJ [1 ]
Kwon, TM
Jhon, MS
机构
[1] Inha Univ, Dept Polymer Sci & Engn, Inchon 402751, South Korea
[2] Carnegie Mellon Univ, Dept Chem Engn, Pittsburgh, PA 15213 USA
关键词
D O I
10.1023/A:1004742223080
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Rheological characterizations were made for various types of magnetic particles (rod-like gamma-Fe2O3, CrO2, and plate-like Ba-ferrite) and nonmagnetic (rod-like alpha-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 alpha-Fe2O3 and magnetic gamma-Fe2O3 particle mixtures on suspension viscosity was also examined, and a negative deviation from the tie line of individual particle viscosities was observed. (C) 2000 Kluwer Academic Publishers.
引用
收藏
页码:889 / 894
页数:6
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