通常用作钡锶氧化物阴极基底的材料是高镍合金(见“氧化物阴极镍基金属”一章和原书第293页),它们用几种方法(见 Mo-3到 N-2等节)中的一种进行制备。涂复以前先要烧氢和(或)真空退火。其他金属,例如钨、钼和钽有时用作直热式氧化物阴极的基金属,但是,它与氧化物涂层的粘附性没有高镍合金的好。 The material commonly used as a cathode substrate for barium strontium oxide is a high-nickel alloy (see “Oxide Cathode Nickel Based Metals” chapter and original book page 293), which uses several methods (see Mo-3 to N- 2 et seq.). Before coating the first to burn hydrogen and (or) vacuum annealing. Other metals, such as tungsten, molybdenum and tantalum, are sometimes used as the base metal for the direct thermal oxide cathode, however, their adhesion to oxide coatings is not as good as high nickel alloys.