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An enhanced polarization mechanism for the metal cations modified amorphous TiO2 based electrorheological materials

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Abstract.

In the present work, we developed a new kind of electrorheological (ER) materials, metal cations modified amorphous TiO2 gels. The static yield stress of Sn4+ modified amorphous TiO2 gel based ER fluid with a volume fraction Φ = 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 TiO2 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.

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Authors and Affiliations

  1. State Key Laboratory of Metal Matrix Composites, Shanghai Jiaotong University, 200030, Shanghai, PRC

    Qing Wu, Bin Yuan Zhao, Chen Fang & Ke Ao Hu

Authors
  1. Qing Wu
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  2. Bin Yuan Zhao
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  3. Chen Fang
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  4. Ke Ao Hu
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Wu, Q., Yuan Zhao, B., Fang, C. et al. An enhanced polarization mechanism for the metal cations modified amorphous TiO2 based electrorheological materials. Eur. Phys. J. E 17, 63–67 (2005). https://doi.org/10.1140/epje/i2004-10108-y

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  • DOI: https://doi.org/10.1140/epje/i2004-10108-y

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