Determination of the effective distribution coefficient (K) for silicon impurities

2012 ◽  
Vol 4 (4) ◽  
pp. 043118 ◽  
Author(s):  
P. R. Mei ◽  
S. P. Moreira ◽  
A. D. S. Côrtes ◽  
E. Cardoso ◽  
F. C. Marques
Keyword(s):  
Distribution Coefficient ◽  
Effective Distribution Coefficient ◽  
Effective Distribution

DETERMINATION OF EFFECTIVE DISTRIBUTION COEFFICIENT OF IMPURITIES DURING ZONE REFINING OF TELLURIUM

2008 ◽  
Vol 22 (16) ◽  
pp. 2583-2588 ◽  
Author(s):  
D. S. PRASAD ◽  
N. R. MUNIRATHNAM ◽  
J. V. RAO ◽  
T. L. PRAKASH
Keyword(s):  
Distribution Coefficient ◽  
Solute Concentration ◽  
Published Data ◽  
Zone Refining ◽  
Translation Rate ◽  
Refining Efficiency ◽  
Experimental Values ◽  
Effective Distribution Coefficient ◽  
Effective Distribution

Knowledge of distribution coefficient values is essential in estimating the refining efficiency, and plays an important role during the purification process, typically zone refining. The effective distribution coefficient "K eff " of impurities Se , Fe , Cr and Pb in tellurium was determined in the present study and found to be 0.48, 0.05, 0.25 and 0.19, respectively. The results are validated by comparing with the available published data, and we observed a difference of less than one order, which was reasonably comparable. The influence of "K eff " on zone refining efficiency was examined and it was noticed that the effective distribution coefficient increases with respect to the translation rate, which is minimum at an optimum lower translation rate (= 30 mm/h ). The relative solute concentration C/C0 is determined experimentally, which shows the best fit of experimental values with Pfann's equation. The impurity profile along the length of the zone refined ingot is also discussed.

Effective distribution coefficient of Te in ZnAs2

2000 ◽  
Vol 36 (4) ◽  
pp. 327-329
Author(s):  
S. F. Marenkin ◽  
L. I. Ochertyanova ◽  
N. K. Bel’skii ◽  
V. F. Kharsika
Keyword(s):  
Distribution Coefficient ◽  
Effective Distribution Coefficient ◽  
Effective Distribution
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