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吸气剂在真空技术中是相当重要的。它可以吸收电真空器件在封离后内部构件放出的残余气体以及微小漏孔渗进的外部杂气,维持器件的真空度,提高器件的寿命。 吸气剂有蒸散型(如钡类吸气剂)和非蒸散型两种。武汉地震大队等单位曾在He-Ne管中使用过蒸散型的钡类吸气剂。钡类吸气剂的缺点是钡膜常在激光管内升华和爬迁,容易引起极间漏电、污染阴极和膜片,对外观也有影响。
Getters are quite important in vacuum technology. The utility model can absorb the residual gas discharged from the internal components and the external impurities infiltrated by the tiny leaks after the vacuum device is sealed so as to maintain the vacuum degree of the device and improve the service life of the device. Getters evaporimeter (such as barium getters) and non-evaporimeter two. Wuhan earthquake brigade and other units have used He-Ne tube evaporimeter barium-based getter. The disadvantage of barium-based getters is that the barium film often sublimates and climbs inside the laser tube, easily causing inter-electrode leakage, contaminating the cathode and the diaphragm, and also affects the appearance.