Patent ID: 8018155
Filing Date: 2011-09-13
Classification: H01J

Abstract:
1. A short arc type high voltage electrical discharge electrode, comprising: an electrode center spindle made from a refractory metal and having a tip; and an electrode main body disposed at the tip of the electrode center spindle, the electrode main body being made from a refractory metal; wherein the electrode center spindle is subjected to a first sintering process to generate a sintered electrode center spindle, the electrode main body is subjected to a second sintering process to generate a sintered electrode main body, and the sintered electrode center spindle is inserted into a center hole of the sintered electrode main body so as to form a combination which is subjected to a third sintering process, a shrinkage ratio of the sintered electrode center spindle is smaller than a shrinkage ratio of the sintered electrode main body, the sintered electrode center spindle has a void content of 5% or less, the combination comprises a plurality of radiator fins, and the contact area of the sintered electrode center spindle and the sintered electrode main body in the state in which the sintered electrode center spindle is inserted into the center hole of the sintered electrode main body is within the range of 0.9 mm