Abstract
The possibility of the separation of Pb-Sb alloys by vacuum distillation was investigated theoretically. The results show that Pb and Sb can be separated by vacuum distillation. However, the experimental results show that vacuum distillation technique does not provide clear separation. According to the literature, Pb-Sb alloys belong to azeotropic compounds under some certain temperature; the experiment and computer simulation were carried out based on the exceptional condition so as to analyze the reason from the experiment and microstructure of Pb-Sb alloys perspective. The separation of Pb-Sb alloys by vacuum distillation was experimentally carried out to probe the azeotropic point. Also, the functions, such as partial radial distributions functions, the structure factor, mean square displacement, and the density of state, were calculated by ab-initio molecular dynamics for the representation of the structure and properties of Pb-Sb alloys with different composition of Sb. The experimental results indicate that there exists common volatilization for Pb-Sb alloys when Sb content is 16.5 wt pct. On the other hand, the calculation results show that there is an intense interaction between Pb and Sb when Sb content is 22 wt pct, which supports the experimental results although Sb content is slightly deviation.
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Acknowledgments
The authors are grateful for the financial support from the Cultivating Plan Program for the Technological Leading Talents of Yunnan Province (2014HA003), the National Natural Science Foundation of China and Project (Grant No. 51474116, 51104079, 51104078), the Joint Program of Natural Science Foundation of China and Yunnan Province (Grant U1202271), the Program for Innovative Research Team in University of Ministry of Education of China (Grant No. IRT1250), the Program for Innovative Research Team in Nonferrous Metal Vacuum Metallurgy of Ministry of Science and Technology (Grant No. 2014RA4018), and the Fundamental Research of Yunnan province (Grant No. 2013FZ033).
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Manuscript submitted July 8, 2014.
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Song, B., Jiang, W., Yang, B. et al. Study on Exploration of Azeotropic Point of Pb-Sb Alloys by Vacuum Distillation and Ab Initio Molecular Dynamic Simulation. Metall Mater Trans A 47, 5214–5222 (2016). https://doi.org/10.1007/s11661-016-3663-8
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DOI: https://doi.org/10.1007/s11661-016-3663-8