METHOD OF MANUFACTURING IMPREGNATED CATHODE

摘要

The method for manufacturing an impregnated-type cathode comprises laminating an electron emission material and a porous tungsten in the storage container in order, coating an iridium oxide on the surface of the tungsten to form a reservoir, firing the reservoir under the vacuum and hydrogen atmosphere to impregnate and surface-treat it, and depositing a sleeve on the circumferential surface of the reservoir. The cathode is used in an electron gun of the television braun tube.