电流变液介电常数与电导率的测量

The measurement of dielectric permittivity and conductivity in electrorheological fluids

采用频率法测定了不同浓度的电流变液介电常数,用电导池常数的方法对不同浓度的电流变液在不同电场强度下的电导率进行了测量。结果表明:电流变液的介电常数基本上随浓度的增加而增大;同一浓度的电流变液的电导率随电场强度的增大而增大,不同浓度的电流变液电导率测量结果表明电导率先随浓度增加而增大,而后减小。分析认为有效离子浓度的变化是导致电流变液导电能力先增加后降低的重要原因。

Dielectric constant of ER fluids with different concentration was measured by frequency method. And the conductivity was measured by the conductivity pool method under various fluids concentration and field strength The experiment results showed that dielectric constant of ER fluids increased with the concentration. The conductivity increases with the field strength for the same fluids concentration, otherwise it increases with field strength, and finally decreases. It is considered that the concentration of effective ion is the main cause.