title: An enhanced polarization mechanism for the metal cations modified amorphous TiO2 based electrorheological materials.
abstract: In the present work, we developed a new kind of electrorheological (ER) materials, metal cations modified amorphous TiO(2) gels. The static yield stress of Sn(4+) modified amorphous TiO(2) gel based ER fluid with a volume fraction Phi = 38% reaches 26.2 kPa at E = 3.5 kV/mm. The result shows that metal cations can significantly enhance the ER activity of amorphous TiO(2) gels. We then proposed a novel ER effect mechanism (metal cations enhanced polarization mechanism) to clarify the experimental results. We believe that it is the metal cations that enhanced the polarization of the polar groups (-OH) which results in the corresponding enhancement of the interfacial polarization.
authors.affiliation: State Key Laboratory of Metal Matrix Composites, Shanghai Jiaotong University, 200030, Shanghai, PRC. oicqing@yahoo.com
authors.forename: Qing
authors.initials: Q
authors.lastname: Wu
authors.forename: Bin
authors.initials: B
authors.lastname: Yuan Zhao
authors.forename: Chen
authors.initials: C
authors.lastname: Fang
authors.forename: Ke
authors.initials: K
authors.lastname: Ao Hu