H - Electricity – 01 – B
Patent
H - Electricity
01
B
31/102
H01B 3/26 (2006.01) C10M 171/00 (2006.01)
Patent
CA 2020679
Electrorheological fluids display swift and reversible increase in apparent viscosity under application of an electric potential difference to the fluid, and are composed generally of electrical insulating oily medium and dielectric fine-particles dispersed therein. In one of its aspects, the present invention relates to a carbonaceous powder for electrorheological fluid which can be employed as dielectric fine-particles to be dispersed in the oily medium and a method of making the carbonaceous powder. The carbonaceous powder for electrorheological fluid of the present invention comprises a carbonaceous powder having a number ratio of carbon atoms to hydrogen atoms (C/H) of 1.70-3.50 and 0.5-13.0% weight loss in a temperature range of 400°C to 600°C during heating the carbonaceous powder under nitrogen atmosphere from room temperature.
Fukuda Noriyoshi
Hatano Hitomi
Ishino Yuichi
Maruyama Takayuki
Nagayama Katsuhiro
Bridgestone Corporation
Kawasaki Steel Corporation
Mccarthy Tetrault Llp
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