Evaluation of the efficiency of the processes of purification of antimony to semiconductor grade purity

摘要

A complex of techniques for purification of antimony from arsenic has been examined with the aid of radiotracer (sup 76)As. The investigated processes comprised vacuum distillation, zone melting and remelting of the metal under artificial slags. The purification efficiencies for the above processes were high and amounted to 94% (for 30% of the charge), 50% (for 50% of the charge) and 99.5% (for 60% of the charge), respectively. Attempts were made to determine the kinetics of the separation of arsenic from antimony by distillation. The application of the radioactive tracer made it possible to determine rapidly the distribution of impurities after each stage of the process within a wide concentration range (10(sup -2)-10(sup -7) g/g). (author). 7 refs, 4 figs, 6 tabs. (Atomindex citation 25:049029)