5N high purity cadmium sheet was prepared by vacuum distillation
Using refined cadmium ingot as raw material,the surface oxide film was removed by pickling and put into vacuum distillation furnace.Through mold design,the influence of mold structure,distillation temperature and vacuum degree on distillation yield was studied,and the key influencing factors of distillation of 5N cadmium sheet were found out,which provided the technical basis for stable preparation of 5N high purity cadmium sheet by vacuum distillation.The experimental results show that when the crucible height/inner diameter ratio reaches 1.667,the distillation temperature is 470℃,and the vacuum system pressure is 1×10-3Pa,the chemical composition of high purity cadmium sheet prepared by vacuum distillation is controllable,the distillation effect is good,and the distillation yield can reach 73%.
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