一、前言 快速阴极显象管自七十年代中期问世以来,世界各先进国家已普遍采用。快速启动显象管的启动时间由原来普通显象管的15—30秒降低到5秒以下,实现了声影同时显示,同时降低了阴极耗电功率,延长了使用寿命。实现快速启动必须减少阴极热容量和热损失,提高阴极的热效率。这就需要使用高温时具有一定强度,导热系数低的薄壁阴极套管。目前上海灯泡厂和陕西彩色显 I. Introduction The rapid cathode fluorescent tube since the advent of the mid-1970s, the world’s advanced countries have been widely used. Quick start kinescope start-up time from the original ordinary picture tube 15-30 seconds reduced to 5 seconds or less, to achieve the simultaneous display of sound and shadow, while reducing the cathode power consumption and prolong the service life. To achieve a quick start, the cathode heat capacity and heat loss must be reduced and the thermal efficiency of the cathode increased. This requires the use of high-temperature has a certain strength, low thermal conductivity of thin-walled cathode casing. Currently, Shanghai Light Bulb Factory and Shaanxi Color Display