کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1797162 1023769 2006 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Study of segregation process of impurities in molten tellurium after one pass of three conjoint zones in zone refining
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Study of segregation process of impurities in molten tellurium after one pass of three conjoint zones in zone refining
چکیده انگلیسی

Zone-melting process provides a great amount of knowledge about parameters governing the process of optimal purification for tellurium, especially the effective segregation coefficients Keff. A series of 13 values of Keff were determined after one pass n=1n=1 and one molten zone N=1N=1 at the same conditions of temperature T and interface velocity V. These values are used to extract a mathematical model of the distribution concentration Ψ3 (x)=CS/C0 for n=1n=1 and N=3N=3, treated 13 times for 13 impurities. After 3 passes of tellurium molten zone, a decrease of the concentration of the residual impurities concentrations was registered, and a better fitting between experimental points CS/C0 with the extracted theoretical model was also observed. Besides, the effect of high conductivity of liquid tellurium was studied; leading to a decrease of the driving forces, therefore the ultimate distribution was enhanced. Under our experimental conditions, we propose N=3N=3 as maximum number of molten zones needed to achieve an ultimate purification of tellurium with good efficiency.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Crystal Growth - Volume 289, Issue 1, 15 March 2006, Pages 260–268
نویسندگان
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