Comment on “An enhanced polarization mechanism for the metal cations modified amorphous TiO2 based electrorheological materials” by Qing Wu, Bin Yuan Zhao, Chen Fang and Ke Ao Hu
Department of Polymer Science and Engineering, Inha University, 402-751, Incheon, Korea
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Accepted: 2 January 2007
Published online: 24 January 2007
Comments on a recent article on an enhanced polarization mechanism for the metal cations modified amorphous TiO2 based electrorheological materials are presented, based upon an examination of the yield stress, which is a function of electric-field strength, of the materials. Using the deduced critical electric-field strengths, we find that the universal yield stress equation proposed collapses the data given by Qing Wu, Bin Yuan Zhao, Chen Fang, Ke Ao Hu, Eur. Phys. J. E 17, 63 (2005), onto a single curve.
PACS: 77.22.-d Dielectric properties of solids and liquids – / 77.22.Ej Polarization and depolarization –
© EDP Sciences, Società Italiana di Fisica and Springer-Verlag, 2007