本发明提供了一种超细晶钨基气体火花开关电极的制备方法，属于粉末冶金粉末制备技术领域。具体制备方法为：使用溶液燃烧合成与氢还原相结合的方法制备稀土氧化物掺杂的纳米钨粉，将纳米钨粉与粘结剂混合制备成喂料，使用注射成形工艺将喂料制成坯体，通过溶剂脱脂与热脱脂相结合的工艺脱出生坯中的粘结剂，然后在1400～1650℃氢气气氛下烧结制成气体火花开关电极产品,其平均晶粒尺寸为0.2～1μm，耐烧蚀性能好。本方法使用湿化学方法制备纳米钨粉，稀土氧化物颗粒可以均匀细小地分散在钨基体中，且粉末的烧结活性高，注射成形工艺可以大批量、高精度地制备气体火花开关电极。

The invention provides a method for preparing an ultrafine crystal tungsten-based gas spark switch electrode, which belongs to the technical field of powder metallurgy powder preparation. The specific preparation method is as follows: prepare rare earth oxide-doped nano tungsten powder by combining solution combustion synthesis and hydrogen reduction, mix nano tungsten powder and binder to prepare feed, and use injection molding process to make feed. The green body is removed from the binder in the green body through the process of combining solvent degreasing and thermal degreasing, and then sintered in a hydrogen atmosphere at 1400 to 1650 ℃ to produce gas spark switch electrode products, with an average grain size of 0.2 to 1 μm. Good ablation resistance. The method uses a wet chemical method to prepare nano-tungsten powder, the rare earth oxide particles can be uniformly and finely dispersed in the tungsten matrix, and the powder has high sintering activity. The injection molding process can prepare gas spark switch electrodes in large quantities and with high precision.