一、前言电真空器件的性能和寿命与管内气氛密切相关。管内的有害气体和杂质气体要减少到尽可能低的程度,因而选用各种类型的吸气剂来得到较为满意的真空气氛。钡吸气剂由于制造简单,价格低廉,吸气性能良好,在电真空器件中应用,管内真空度通常可提高1～2个数量级。可是,钡吸气剂蒸散后,因钡吸气剂会释放出一定量的氩 I. INTRODUCTION The performance and life expectancy of electric vacuum devices are closely related to the atmosphere in the tube. Tube of harmful gases and impurities to reduce the gas to the extent possible, so the choice of various types of getters to get a more satisfactory vacuum atmosphere. Barium getter due to simple manufacture, low cost, good gettering performance, the application of vacuum devices, the vacuum tube can usually be increased by 1 to 2 orders of magnitude. However, barium getters evaporate, barium getters will release a certain amount of argon