| abstract |
The present invention relates to an electrorheological fluid which is capable of increasing viscosity under an application of electric potential difference. n An electrorheological fluid according to the present invention comprises dielectric particulates dispersed in a highly electrically insulating oily medium, in which the particulates are carbonaceous particulates having an atomic ratio of carbon atoms to hydrogen atoms (C/H) of 1.70-3.50 and an average particle size of from 0.01 to 100 μm, and the oily medium is an electrical insulating oil having a dielectric constant of not less than 3 and a volume resistivity of not less than 10 9 Ω·cm. |