Negita K, Misono Y, Yamaguchi T, Shinagawa J
Department of Chemistry, Faculty of Science, Fukuoka University, Nanakuma 8-19-1, Jonan-ku, Fukuoka 814-0180, Japan.
J Colloid Interface Sci. 2008 May 15;321(2):452-8. doi: 10.1016/j.jcis.2008.01.054. Epub 2008 Mar 14.
Measurements of electrorheological (ER) effects, dielectric properties, and electrical conductivity are made on an ER suspension composed of carbonaceous particles and silicone oil to understand the mechanism which governs the ER effect. In the frequency dependence of the dielectric permittivities, a dielectric dispersion is observed in the first-order dielectric permittivity, while in the third-order dielectric permittivity a resonance peak, which is due to shear-induced particle rotation, is recognized, showing that such dielectric properties are closely related to ER properties of the suspension. An electrical conduction mechanism, which is responsible for the ER effect, is also investigated from the dependence of dc electrical conductivity on electric-field strength and temperature.
对由碳质颗粒和硅油组成的电流变（ER）悬浮液进行电流变效应、介电性能和电导率的测量，以了解控制电流变效应的机制。在介电常数的频率依赖性方面，在一阶介电常数中观察到介电色散，而在三阶介电常数中识别出由于剪切诱导颗粒旋转而产生的共振峰，这表明此类介电性能与悬浮液的电流变性能密切相关。还从直流电导率对电场强度和温度的依赖性出发，研究了负责电流变效应的导电机理。
