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一、引言氧化物阴极自1904年闻世以来,就以发射电流密度大、灯丝加热温度低、制备简单等优点,在电真空器件中被迅速广泛地应用着。但是,氧化物阴极也有它的缺点,除阴极涂层机械强度欠牢固外,还有个致命的弱点,即容易中毒,经不起氧、水汽等有害气体的毒害,一般氧化物阴极在暴露大气后就不能用了。所以人们常说它“娇气”。对于有关氧化物阴极中毒性能和机理,曾有很多文章专门讨论过。然而,由工业电子管中取出的氧化物阴极的利用方面的文章,至今见到的很少。1965年简要报导过罗马尼亚人
I. INTRODUCTION Oxide cathodes have been rapidly and widely used in electric vacuum devices since their introduction in 1904 due to the advantages of large emission current density, low filament heating temperature and simple preparation. However, the oxide cathode also has its shortcomings. In addition to the mechanical strength of the cathode coating is not strong, there is a fatal weakness, that is easy to poison, can not withstand the poisonous gas such as oxygen, water vapor, the general oxide cathode in the exposed atmosphere Can not be used after So people often say that it is “delicate.” There have been many articles devoted to the performance and mechanism of oxide cathode poisoning. However, the articles on the utilization of oxide cathodes removed from industrial tubes have so far been seldom seen. Brief report on Romanian in 1965