国产或进口的浓缩同位素有的以氧化物形式提供。为了用真空蒸发、滚轧和聚焦束溅射等方法制备金属同位素靶,首先要将氧化物还原成金属。还原蒸馏法是将氧化物转换成金属的有效方法之一,其基本过程是在高温和高真空下,金属氧化物与还原剂起反应,金属同位素被还原并冷凝在收集杆 Some domestic or imported concentrated isotopes are provided as oxides. In order to prepare metallic isotope targets by vacuum evaporation, rolling and focused beam sputtering, the oxide must first be reduced to a metal. Reductive distillation is one of the effective methods to convert oxides to metals. The basic process is that under high temperature and high vacuum, the metal oxide reacts with the reductant and the metal isotopes are reduced and condense on the collecting rod