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)。
The 4N （99.99%） tellurium is purified by vacuum distillation under 550℃ and 0.5 Pa, the majority impurities were drastically reduced from 86 × 10^-6 ·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/（cm^2·s）.
出处
《有色金属（冶炼部分）》
CAS
北大核心
2007年第1期20-22,共3页
Nonferrous Metals（Extractive Metallurgy)
关键词
碲
提纯
真空蒸馏
ICP—OES分析
Tellurium
Purification
Vacuum distillation
ICP-OES analysis
