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Meeting 2017 TMS Annual Meeting & Exhibition
Symposium Solar Cell Silicon
Presentation Title Effect of Magnesium Addition on Removal of Impurities from Silicon by Hydrometallurgical Treatment
Author(s) Stine Espelien, Gabriella Tranell, Jafar Safarian
On-Site Speaker (Planned) Jafar Safarian
Abstract Scope Hydrometallurgical treatment of silicon is an effective process for the removal of metallic impurities for producing solar grade silicon feedstock. In the present research, the removal of impurities from silicon is studied through the addition of Mg into a commercial silicon, its solidification, and acid leaching. The effect of particle size, concentration of HCl and temperature on the removal of impurities are studied. It is shown that the impurities such as B, P, Fe, Al, Ti, Ca,… are effectively removed through the applied method and Mg improves the segregation and the removal of the impurities. Scanning electron microscopy examination of the samples indicates the disintegration and dissolution of Mg2Si phase in acid leaching which causes the chemical and physical removal of the impurities existing in the phases between the silicon grains. It is shown that the leaching process rate can be optimized through the control of the acid leaching conditions.
Proceedings Inclusion? Planned: Stand-alone book in which only your symposium’s papers would appear (indicate title in comments section below)


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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