一、引言 CPC阴极又称粉敷镍阴极,它是一种中等电流密度、高可靠、长寿命的新型氧化物阴极。现在已越来越被人们所重视。最早的CPC粉的制备是采用四羰基镍,由于四羰基镍极毒,对人体为害很大,后来改用醋酸镍、二茂基镍等有机金属化合物,由于醋酸镍要在管内分解,对真空零件有污染,所以最常用的是采用 First, the introduction CPC cathode, also known as powder nickel cathode, it is a medium current density, high reliability, long life of the new oxide cathode. Now more and more people have valued. The earliest preparation of CPC powder is the use of tetracarbonyl nickel, due to the extremely toxic nickel tetracarbonyl, harmful to the human body, then switch to nickel acetate, nickel and other organometallic compounds, due to nickel acetate decomposition in the tube, the vacuum parts Pollution, so the most commonly used is