摘要:
正 随着各种特殊电真空器件和电子束设备的发展,要求阴极能适应相应的环境。如密封油膜光阀管,就需要能抵抗油蒸汽中毒的阴极。国外使用一种含钍的储备式阴极,但钍有放射性污染。我们研制了一种没有放射性污染的镧钨阴极。Albert等人曾发表过这类阴极的发射数据。Gallagher报道过这类阴极抗氧中毒的性能。但迄今,尚未见到这类阴极的其他性能和运用情况的报道。 几年来,我们对镧钨阴极进行了研究,选择了一种新配方,做出了以WC,La,Pt三
Abstract:
A new type of dispenser cathode which is fabricated by compressing and sintering a mixture of powdered tungsten carbide, lanthanum and platinum has been developed. It has good properties: high emission current density, good ability of resisting the poisoning of gas, exposed to atmosphere repeatedly without deterioration and long life.The cathode can particularly withstand the poisoning of oil vapour, so that they have been successfully used in sealed oil film light value tube.
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