【摘要】 采用真空蒸馏法提纯4N(99.99%)碲,在550℃、0.5Pa的动态真空条件下,大部分杂质从86×10-6降到7×10-6。延长冷凝段长度,蒸汽压比碲高的杂质(除Se外),即Cd、Zn和As明显减少。5N(99.999%)碲总的收率达到97%,平均蒸馏速度1.4×10-4g/(cm2.s)。更多还原

【Abstract】 The 4N(99.99%) tellurium is purified by vacuum distillation under 550℃ and 0.5 Pa,the majority impurities were drastically reduced from 86×106·to 7×10-6.High vapour pressure impurities except Se in tellurium melt, namely Cd,Zn and As were considerably reduce in extending condensation segment.The overall yield rate of 5N(99.999%) tellurium was up to 97% at an average distillation rate of 1.4×10-4 g/(cm2·s).更多还原