霓虹灯同很多电光源器件一样,要求有较高的真空度,如若真空度欠佳,不仅启跳困难、闪烁打转、管壁温度升高,使阴极容易溅射发黑,导致寿命缩短,且还会使灯管的发光颜色也发生变化。可见真空度的好坏,对灯管品质影响极大。如何才能有效地提高真空度是很值得我们去探讨的。现时我们制作霓虹灯管时排气用的排气台,大都是用双级机械泵作粗抽,油扩散泵作精抽,也有不少 Neon lights, like many electric light source devices, require a higher degree of vacuum. If the degree of vacuum is not good, not only is it difficult to start jumping, twinkling and twisting, the temperature of the wall is increased, the cathode is easily sputtered black, resulting in a shortened life span. Will make the light color of the lamp also change. Visible vacuum is good or bad, a great impact on the quality of the lamp. How to effectively improve the degree of vacuum is worth our exploration. At present, when we make exhaust pipes for neon tubes, we mostly use two-stage mechanical pumps for rough pumping, oil diffusion pumps for fine pumping, and many