| 摘要 |
The present invention discloses an electrorheological fluid comprising: spherical carbonaceous particles obtained substantially from a solvent and a condensation product formed by a methylene type bonding of an aromatic sulfonic acid or a salt thereof as materials; and an electric insulating oil. The electric insulating oil preferably has a relative dielectric constant of 3 or more and a kinematic viscosity at 25 DEG C of 1 to 100 mm<2>/second. The electric insulating oil may be, for example, fluorosilicone oil, a mixture of fluorosilicone oil and silicone oil, or a mixture of dimethyl silicone oil and modified silicone oil. The electrorheological fluid of the present invention may further include modified silicone oil at a weight percentage of 0.01 to 5%. The electrorheological fluid of the present invention preferably has a dielectric breakdown strength of 4.0kV/mm or more. |
