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The mechanism of boron removal in the CaO–SiO2–Al2O3 slag system for SoG-Si

Eun Jin Jung, Byung Moon Moon, Seong Ho Seok and Dong Joon Min

Energy, 2014, vol. 66, issue C, 35-40

Abstract: The dissolution behavior of boron in a molten slag was evaluated at 1773 K to establish the boron removal mechanism from silicon refining for preparing higher purity solar-grade silicon. From the experimental results, a mechanism of boron removal from silicon into the CaO–SiO2–Al2O3 slag system was confirmed to proceed via BO33− and B62− following a linear relationship with oxygen partial pressure in the slag system. In addition, the distribution ratio of boron was seen to increase with increasing slag basicity.

Keywords: Boron; Slag refining; SoG-Si; Oxygen partial pressure; Capacity; Optical basicity (search for similar items in EconPapers)
Date: 2014
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