Effect of Temperature on Segregation Coefficients of Impurities in Phosphorus

doi:10.1016/S1004-9541(14)60044-6

Chinese Journal of Chemical Engineering ›› 2014, Vol. 22 ›› Issue (3): 294-298.DOI: 10.1016/S1004-9541(14)60044-6

Effect of Temperature on Segregation Coefficients of Impurities in Phosphorus

刘雪峰¹, 李军¹, 罗建洪¹, 周堃², 杨兆鹏¹

1 College of Chemical Engineering, Sichuan University, Chengdu 610065, China;
2 College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China

收稿日期:2012-08-28 修回日期:2013-04-05 出版日期:2014-03-28 发布日期:2014-03-05
通讯作者: LI Jun

Effect of Temperature on Segregation Coefficients of Impurities in Phosphorus

LIU Xuefeng¹, LI Jun¹, LUO Jianhong¹, ZHOU Kun², YANG Zhaopeng¹

1 College of Chemical Engineering, Sichuan University, Chengdu 610065, China;
2 College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China

Received:2012-08-28 Revised:2013-04-05 Online:2014-03-28 Published:2014-03-05
Contact: LI Jun

摘要/Abstract

摘要： The present work is focused on the relationship between effective segregation coefficient k_eff and temperature of melting zone for purification of phosphorus by zone melting method. Values of k_eff at four temperatures of melting zone are obtained for zone pass n =1 at travel velocity of molten zone v =5×10^-3 m·h^-1 and initial impurity concentration C₀≤10 μg·g^-1. lnk_eff is a linear function of 1/T. The k_eff values of Al, Ca, Cr, Fe, Cd and Sb increase with temperatures while that of Mg is almost constant. The purification is acceptable at lower temperature of melting zone such as 323 K. The variations of enthalpy and entropy between impurities and phosphorus in the liquid and solid phases are also presented.

关键词: phosphorus, purity, temperature, effective segregation coefficient, zone melting

Abstract: The present work is focused on the relationship between effective segregation coefficient k_eff and temperature of melting zone for purification of phosphorus by zone melting method. Values of k_eff at four temperatures of melting zone are obtained for zone pass n =1 at travel velocity of molten zone v =5×10^-3 m·h^-1 and initial impurity concentration C₀≤10 μg·g^-1. lnk_eff is a linear function of 1/T. The k_eff values of Al, Ca, Cr, Fe, Cd and Sb increase with temperatures while that of Mg is almost constant. The purification is acceptable at lower temperature of melting zone such as 323 K. The variations of enthalpy and entropy between impurities and phosphorus in the liquid and solid phases are also presented.

Key words: phosphorus, purity, temperature, effective segregation coefficient, zone melting

刘雪峰, 李军, 罗建洪, 周堃, 杨兆鹏. Effect of Temperature on Segregation Coefficients of Impurities in Phosphorus[J]. Chinese Journal of Chemical Engineering, 2014, 22(3): 294-298.

LIU Xuefeng, LI Jun, LUO Jianhong, ZHOU Kun, YANG Zhaopeng. Effect of Temperature on Segregation Coefficients of Impurities in Phosphorus[J]. Chin.J.Chem.Eng., 2014, 22(3): 294-298.

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Effect of Temperature on Segregation Coefficients of Impurities in Phosphorus

Effect of Temperature on Segregation Coefficients of Impurities in Phosphorus

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