Abstract
By applying our developed intelligent fluid, magnetic compound fluid (MCF), to silicon oil rubber, we have made the MCF rubber highly sensitive to temperature and electric conduction. MCF is useful as an element material in haptic robot sensors and other related devices. By mixing metal particles in the silicon oil rubber and by applying a strong magnetic field to the rubber, high-density clusters of these particles can be formed. In a previous study, we investigated the electric current resulting from the applied voltage. In the present paper, we discuss the capacitance of the MCF rubber. The capacitance as well as the electric current can be explained by quantum theory and behaves as a semiconductor. Regarding the thermal characteristics, in the present paper, the thermal effect on the electric current and the temporary thermal conductivity differ depending on the applied pressure to the MCF rubber and based on the formation of the magnetic clusters. We also explained the tendency of the electric current and the temporary thermal conductivity during the application of heat under low pressure using quantum mechanics theory and clarified the material behavior as a semiconductor based on the thermal characteristics as well as the electric characteristics.
Highlights
Shimada et al have demonstrated experimentally the use of his intelligent fluid, magnetic compound fluid (MCF) [1,2,3]
The thermal effect on the electric characteristics of transmitted electric current in the MCF rubber is changed according to the quantitative value of the applied compression force
In the case of a small compression force, the thermal effect on the transmitted electric current can be explained by quantum theory
Summary
Shimada et al have demonstrated experimentally the use of his intelligent fluid, magnetic compound fluid (MCF) [1,2,3]. By using network-like magnetic clusters in the MCF rubber, we can expect to make a haptic sensor with high electric and temperature sensitivity, as discussed by Zheng and Shimada [22]. The electric conductivity of the MCF rubber that has network-like magnetic clusters is greater than that of ordinary commercial base electric conductive rubber. MCF rubber is effective for switching sensors when a small deformation is applied to it The improved MCF rubber has greater electric resistivity change because carbon blacks as the other metal particles are involved in the MCF rubber These facts indicate the differences between MCF rubber and ordinary commercial base electric conductive rubber. In the present paper, we demonstrate and discuss the use of MCF rubber as a semiconductor
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