DISCHARGE TUBE AND PRODUCTION METHOD THEREFOR

摘要

Provided are a discharge tube that is capable of improving operating voltage stability against repeated discharges and a production method therefor. This discharge tube comprises at least one insulating hollow body (2) having a plurality of openings and at least two sealing electrodes (3) closing the openings for sealing a discharge control gas within. On each of the surfaces of the sealing electrodes exposed to the interior of the insulating hollow body, a discharge active layer (4) is formed. The discharge active layer contains Na, Si, Cs, C and O, has a balance of unavoidable impurities, is amorphous, and has Na, Si, Cs, C, and O evenly distributed.