Multi-coated spheres: recommended electrorheological particles
- 21 November 1998
- journal article
- Published by IOP Publishing in Journal of Physics D: Applied Physics
- Vol. 31 (22), 3312-3315
- https://doi.org/10.1088/0022-3727/31/22/021
Abstract
This paper considers the design of electrorheological (ER) particles. Multi-coated particles suspended in insulating (very weakly conducting) oil are recommended for obtaining high-performance ER suspensions. Only the outer two coatings determine the ER strength. The outermost coating should be a material with high dielectric constant, high electrical breakdown strength and a reasonable level of conductivity. The coating immediately below should be a highly conducting material. The inner coatings, including the core (which can be void), can be of any material having such a density that the composite particle has substantially the same density as the host liquid. Our analysis gives that multi-coated particles can have an ER shear strength as high as 29 kPa when the volume fraction of particles is 0.4 and the applied field is 5 kV . Results in the literature provide support for the concept and analysis.Keywords
This publication has 9 references indexed in Scilit:
- Dielectric and conduction effects in non-Ohmic electrorheological fluidsPhysical Review E, 1997
- Influence of a surface film on conducting particles on the electrorheological response with alternating current fieldsJournal of Applied Physics, 1997
- New Electrorheological Fluid: Theory and ExperimentPhysical Review Letters, 1997
- Influence of a surface film on the particles on the electrorheological responseJournal of Applied Physics, 1997
- A modified conduction model for the electrorheological effectJournal of Physics D: Applied Physics, 1996
- CONDUCTIVITY AND FORCE BETWEEN PARTICLES IN A MODEL ELECTRORHEOLOGICAL FLUID I: CONDUCTIVITYInternational Journal of Modern Physics B, 1996
- INFLUENCE OF PARTICLE SIZE ON THE DYNAMIC STRENGTH OF ELECTRORHEOLOGICAL FLUIDSInternational Journal of Modern Physics B, 1994
- Electrostatic particle-particle interactions in electrorheological fluidsJournal of Applied Physics, 1991
- Induced Fibration of SuspensionsJournal of Applied Physics, 1949