Magnetorheological Fluid And Braking Device
AssigneeSeiko Epson Corporation
InventorsDaisuke ISHIHARA, Takeshi YANO, Shigeki KAWADA
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Abstract
A magnetorheological fluid includes: a first metal magnetic particle having an average particle diameter of 5 μm or more; a second metal magnetic particle having an average particle diameter of 500 nm or less; and an ionic liquid having a cationic group and an anionic group, in which the cationic group is one or more selected from the group including a quaternary ammonium ion, an imidazolium ion, a pyridinium ion, and a phosphonium ion, and the anionic group is one or more selected from the group including a tetrafluoroborate ion, a hexafluorophosphate ion, a trispentafluoroethyl trifluorophosphate ion, and a bis(trifluoromethanesulfonyl)amide ion.
Claims8
A magnetorheological fluid comprising:
- a first metal magnetic particle having an average particle diameter of 5 μm or more;
- a second metal magnetic particle having an average particle diameter of 500 nm or less;
- and
- an ionic liquid having a cationic group and an anionic group, wherein
- the cationic group is one or more selected from the group including a quaternary ammonium ion, an imidazolium ion, a pyridinium ion, and a phosphonium ion, and
- the anionic group is one or more selected from the group including a tetrafluoroborate ion, a hexafluorophosphate ion, a trispentafluoroethyl trifluorophosphate ion, and a bis(trifluoromethanesulfonyl)amide ion.
Dependencies are inferred from the claim text.