Magnetorheology of carbonyl-iron Suspensions with submicron-sized filler

Author

Lim, Sung Taek ; Cho, Min Seong ; Jang, In Bae ; Choi, Hyoung Jin ; Jhon, Myung S.

Author_Institution

Dept. of Polymer Sci. & Eng., Inha Univ., Inchon, South Korea

Volume

40

Issue

4

fYear

2004

fDate

7/1/2004 12:00:00 AM

Firstpage

3033

Lastpage

3035

Abstract

We added novel submicron-sized particles into carbonyl-iron (CI) suspension to improve the sedimentation problem. The added string-like graphite nano-fiber enhanced the resistance to sedimentation and improved flocculation stability without macroscopically noticeable change in the magnetorheological behaviors. This gap-filling submicron-sized particle between μm-sized CI spheres reduced the physical contact of CI particles, and reduced the caking behavior. These systems with and without additives were investigated and compared via a rotational rheometer by accurately controlling the magnetic field strengths.

Keywords

ferrimagnetic materials; flocculation; iron compounds; magnetic particles; magnetorheology; sedimentation; suspensions; caking behavior; carbonyl-iron suspensions; flocculation stability; gap-filling submicron-sized particle; magnetic field strengths; magnetorheology; physical contact; rotational rheometer; sedimentation problem; sedimentation resistance; shear viscosity; string-like graphite nanofiber; submicron-sized filler; Additives; Chemicals; Magnetic fields; Magnetic liquids; Magnetic materials; Rheology; Stability; Stress; Suspensions; Viscosity; CI; Carbonyl iron; magnetic particle; magnetorheology; sedimentation; shear viscosity; submicron-sized filler;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2004.830400

Filename

1325723