论文部分内容阅读
极性分子型电流变液是一种新型的电流变材料.其介电颗粒上吸附极性分子,极性分子在颗粒间强局域电场作用下发生取向是产生巨电流变效应的关键.通过对Ca—Ti—O(CTO)体系极性分子型电流变液电流密度的测量发现,其导电行为遵从Poole-Frenkel效应的规律,这是极性分子型电流变液的重要特征之一.而500℃处理过的CTO粉体不含极性分子,所配制的电流变液无巨电流变效应,其电流密度随外电场强度近似地呈线性关系,显示出传统电流变液特性。
Polar molecular electrorheological fluid is a new type of electrorheological material. The adsorption of polar molecules on the dielectric particles and the orientation of the polar molecules under the action of a strong local electric field between the particles are the key to the electrorheological effect. The measurement of Polar-Frenkel effect on the conductivity of Ca-Ti-O (CTO) system showed that the conductivity of Polar-Frenkel effect was one of the most important characteristics of polar molecular ER fluids. The CTO powders treated at 500 ℃ do not contain polar molecules, and the prepared ER fluids have no macroscopic ER effect, and the current density of the CTO powders has a linear relationship approximately with the intensity of the external electric field, which shows the characteristics of the ER fluids.