Electrorheological fluid compositions

Details Electrorheological fluid compositions Electrorheological fluid compositions

1991-07-22

1994-03-15

McFarlane, Anthony

Chemistry of inorganic compounds

Silicon or compound thereof

Oxygen containing

252 75, 252 783, 252573, C01B 3308, C01B 3312, C10M12526

Patent

active

052944263

ABSTRACT:
Electrorheological fluid compositions of this invention are dispersions in an electrically insulating medium of 10 to 50% by volume of spherical silica particles prepared by hydrolyzing a silicon alkoxide of the general formula Si(OR).sub.4 in which R is an alkyl group in the presence of an alkali catalyst and drying at or below 500.degree. C., show excellent fluidity in the absence of an applied voltage, vary reversibly to the state of high viscosity or even to the state of gel on application of a voltage, and have good storage stability.

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