(ZnO/金属)複合電極を有する微小ギャップのインパルス放電特性

抄録

The paper describes the discharge phenomena of a small air gap with ceramics composite-plane electrodes under pulse voltages. The discharge voltage decreases with increasing projection distance of ceramics from a comb-shaped metal electrode. Even if the projection distance is zero, the discharge voltage is lower than that of comb-shaped metal electrode. This shows that the discharge is extremely sensitive to the local high field caused by a triple junction. The surface discharge on ceramics occurs after the gap discharge, and it always initiates at the negative side irrespective of the polarity of the applied pulse voltage. These anomalous discharge characteristics are discussed on the basis of the experimental results.