一种大发射热阴极
A HIGH CURRENT DENSITY THERMIONIC CATHODE
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摘要: 正 很久以来,许多研究阴极的工作者都试图把稀土金属氧化物掺和在氧化钡中,制成稀土金属钡盐,作为钡钨阴极的发射物质,以改进一般铝酸盐钡钨阴极的性能。这些努力已取得一定的成效,特别是含氧化钪的钡钨阴极取得了更为引人注目的进展。但迄今为止,只见到有关这种阴极的发射性能的报道而尚未见到有关它的其他性能以及应用情况的报道。 几年来,我们也开展了含稀土元素的钡钨阴极特别是钪酸盐钡钨阴极的研究。最近
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关键词:
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. -
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