概况阴极—电子管的心脏,这个称呼是千真万确的,它说明了阴极在电真空器件中的重要性。近年来随着电真空器件的飞跃发展,对阴极提示了愈来愈高的要求,例如在工作温度下,要求有大的发射电流密度,发射要均匀稳定,可靠性要高,寿命长……等。同时在制造工艺上要求经济简便,便于大规模和自动化生 Overview Cathode - the heart of the tube, this name is true, it shows the cathode in the vacuum device importance. In recent years, with the rapid development of electrical vacuum devices, the cathode is prompted by higher and higher requirements, for example, at the operating temperature, requires a large emission current density, the emission should be uniform and stable, high reliability, long life ... Wait. At the same time in the manufacturing process requires economic and simple, easy to large-scale and automated students