Thermodynamic Study of Removing Boron from Metallurgical Silicon by Si – Al Melt Refining

Yan Hui Sun; Bo Wang; Tao Lin; Xu Lang; Hong Yu Chen

doi:10.4028/www.scientific.net/AMR.550-553.2621

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 550-553Thermodynamic Study of Removing Boron from...

Thermodynamic Study of Removing Boron from Metallurgical Silicon by Si – Al Melt Refining

Abstract:

The distribution of boron between solid silicon and melt Si-Al alloy (K_B) and the interaction coefficients between aluminum and boron in solid silicon were investigated by establishing the equilibrium between Si–B alloy and aluminum at 1623 K ~ 1723 K for 4 h and then quenching them to obtain the content of boron and aluminum in silicon and Si-Al melt. The results shown that the distribution coefficients of boron KB are 0.139~0.325 (1623K), 0.332~0.587 (1673K), 0.684~0.956 (1723K), and the interaction coefficients are 32.8±2.34 (1623K), 16.3±1.17 (1673K) and 8.2±0.6 (1723K).

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Periodical:

Advanced Materials Research (Volumes 550-553)

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2621-2624

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.550-553.2621

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Online since:

July 2012

Authors:

Yan Hui Sun*, Bo Wang, Tao Lin, Xu Lang, Hong Yu Chen

Keywords:

Boron Removal, Si-Al Alloying, Silicon, Thermodynamic

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