一種大發(fā)射熱陰極
A HIGH CURRENT DENSITY THERMIONIC CATHODE
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摘要: 正 很久以來,許多研究陰極的工作者都試圖把稀土金屬氧化物摻和在氧化鋇中,制成稀土金屬鋇鹽,作為鋇鎢陰極的發(fā)射物質(zhì),以改進一般鋁酸鹽鋇鎢陰極的性能。這些努力已取得一定的成效,特別是含氧化鈧的鋇鎢陰極取得了更為引人注目的進展。但迄今為止,只見到有關這種陰極的發(fā)射性能的報道而尚未見到有關它的其他性能以及應用情況的報道。 幾年來,我們也開展了含稀土元素的鋇鎢陰極特別是鈧酸鹽鋇鎢陰極的研究。最近
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關鍵詞:
Abstract: A dispenser cathode which consists of a porous body of tungsten impregnated with barium scandate has been developed. It has good properties: high emission current density, low evaporation rate, good reactivation ability after poisoning and long life. This kind of cathode is suitable for use as an electron emitter for certain high power microwave tubes and the like. -