| 摘要 |
PURPOSE:To observe the polarization characteristic of material and the dielectric breakdown characteristic of the material, by measuring the transient current induced by the energy absorption occuring in the phenomenon that the material structure when conducted with electricity is subjected to a polarization by a dielectric phenomenon and the phenomenon entailing the material breakdown caused by the application of voltage. CONSTITUTION:A pair of needle electrodes E1, E2 are brought into contact with the surface of a sample S, and the constant DC voltage from a constant DC voltage power source 2 is applied between both electrodes E1 and E2. Stationary current and transient current flow in a measurement circuit provided between the electrodes E1 and E2 through the sample S, and the voltage generated in proportion to the current at both terminals of a load resistor R is differentiated with a differentiator 2 and is recorded as the functions of the polarization and dielectric breakdown characteristics of the sample in a recorder 4. The application of the voltage on the electrodes E1, E2 is stopped upon ending of the transient phenomenon; at the same time, terminals 5, 6 are short- circuited and the voltage generated at both terminals of the load resistor R by the electric current flowing in said stage is differentiated by a differentiator and is recorded as the function of the polarization characteristic of the sample in the recorder 4. |
