title: Preparation and electrorheological property of rare earth modified amorphous BaxSr1-xTiO3 gel electrorheological fluid.
abstract: In this paper, we present a newly developed rare earth modified amorphous barium strontium titanate (Ba(x)Sr(1-x)TiO3) gel/silicone oil electrorheological (ER) fluid. The ER behaviors of suspensions of pure and rare earth modified amorphous Ba(x)Sr(1-x)TiO3 particles in silicone oil have been investigated under a dc electric field. The shear yield stress of the rare earth modified amorphous BaTiO3 gel/silicone oil ER fluid could reach 14.9 kPa at E=3.5 kV/mm while the leaking current density was very low, about 7.64 microA/cm2. The ER fluids with a higher volume fraction had a higher current density and a higher shear yield stress under the same electric field. The ER fluid has a long-term stability against sedimentation. The problem of caking was not serious and the agglomerated particles could be easily broken up by strongly stirring.
authors.affiliation: State Key Laboratory of Metal Matrix Composites, Shanghai Jiaotong University, Shanghai 200030, People's Republic of China. oicqing@yahoo.com
authors.forename: Qing
authors.initials: Q
authors.lastname: Wu
authors.forename: Bin yuan
authors.initials: By
authors.lastname: Zhao
authors.forename: Le Sheng
authors.initials: le S
authors.lastname: Chen
authors.forename: Chen
authors.initials: C
authors.lastname: Fang
authors.forename: Ke ao
authors.initials: Ka
authors.lastname: Hu