阴极中间层阻抗

• 作 者: 毕建明
• 出 处: 真空电子技术
• 发表日期: 2004年期
• 关键词: 阻抗 阴极 中间层 引出电极 氧化物阴极 电子管 化学状态 机械设计 五极管 跨导

Ⅰ、概述在电子管氧化物阴极的表面和其外部引出电极之间总存在三种阻抗(虽在特定的条件下,某一种或一种以上可以被忽略):阴极引线阻抗、阴极中间层阻抗和阴极涂层阻抗。在这三种阻抗中,阴极引线阻抗是感抗性的,它由电子管的机械设计确定;但是,阴极中间层阻抗和阴极涂层阻抗主要取决于阴极的化学状态,因此

I. OVERVIEW There are always three impedances between the surface of the tube oxide cathode and its external lead-out electrode (although one or more may be ignored under certain conditions): cathode lead impedance, cathode intermediate layer impedance And cathode coating resistance. Of these three impedances, the cathode lead resistance is inductive and is determined by the mechanical design of the tube; however, the cathode interlayer resistance and the cathode coating resistance are mainly dependent on the chemical state of the cathode and therefore