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Meeting 2017 TMS Annual Meeting & Exhibition
Symposium Solar Cell Silicon
Presentation Title Study on the Segregation Behavior of Impurities during Solvent Refining Process
Author(s) Li Jiayan, Tan Yi
On-Site Speaker (Planned) Li Jiayan
Abstract Scope Solvent refining is a low-temperature and high refining efficiency Si purification process, in which Si recrystallization takes place from the supersaturated Si-based alloy melt depending on the retrograde behavior of impurity. More attentions have been focused on Si-Al alloy system, which is an economical alloy and can effectively lower the content of B and P. However, the B segregation mechanisms during the alloy solidification process is lack, and the refined silicon can not be separated effectively from the alloy, resulting in a waste of energy and time. In this work, Al and Sn were used as solvent metals to purify metallurgical grade silicon and the segregation behaviours of B were initially clarified. Moreover, the effect of direct electric current on redistribution and microstructure of primary silicon in alloy simple has been studied. This method was attempted by the directional solidification method in order to separate Si from the alloy.
Proceedings Inclusion? Planned: Stand-alone book in which only your symposium’s papers would appear (indicate title in comments section below)

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Characterization of Composition, Morphology, and Structure of Disi Raw Sandstones in Jordan
Effect of Magnesium Addition on Removal of Impurities from Silicon by Hydrometallurgical Treatment
Electrodeposition of Solar Grade Silicon on Graphite in Molten CaCl2
Electrodynamic Eddy Current Separation of End-of-Life PV Materials
Evaporation Removal of Boron in Molten Silicon Using Reactive Fluxes
Influence of Oxygen Content on the Wettability of Silicon on Graphite
Investigation on Quartz Crucibles for Monocrystalline Silicon Ingots for Solar Cells
Particle Separation in Silicon Ingot Casting Using AC Magnetic Field
Phase Analysis of the Si-O2 System
Study on Producing Solar Grade Silicon by Carbothermal Reduction of Andalusite Ore
Study on the Segregation Behavior of Impurities during Solvent Refining Process
Topological Impurity Segregation at Faceted Silicon Grain Boundaries

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