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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium Solar Cell Silicon
Presentation Title Crystal Growth Mechanism of Si in Hypereutectic Al-Si Melt during the Electromagnetic Directional Solidification
Author(s) Jie Li, Wenzhou Yu, Xuewei Lv
On-Site Speaker (Planned) Wenzhou Yu
Abstract Scope An efficient enrichment of primary silicon from the Al-Si melt can be beneficial for the Si purification and the cost reduction of the solvent refining process. In this paper, an alternating magnetic field was used to enhance the mass transfer and promote the crystal growth of primary silicon during the directional solidification of hypereutectic Al-Si alloy. The results show that the growth rate and morphologies of Si crystals changed continuously along the directional solidification direction. With the decreasing of Si content in the melt and the weakness of the electromagnetic stirring, the crystal growth rate of primary silicon gradually decreased and the Si morphologies changed from the plane to cellular, cellular dendrite, and columnar dendritic, respectively. This provides a deep understanding of the Si crystal growth during the electromagnetic solidification, which will be good for achieving a high-efficiency enrichment of primary silicon in Al-Si melt.
Proceedings Inclusion? Planned:


Boron Removal from Ferrosilicon Alloy via Slag Treatment
Crystal Growth Mechanism of Si in Hypereutectic Al-Si Melt during the Electromagnetic Directional Solidification
Enhancement of Efficiency in Nanostructured-Si Solar Cells by Employing Doped-graphene Transparent Conductive Electrodes
Influence of Chemical and Heat Treatment on the Properties of Disi Raw Sandstones in Jordan
K-17: High Temperature Pressure Filtration Applying for Separation of Silicon and Liquation Agent
K-18: Leaching of Indium from ITO Present in Amorphous Silicon Photovoltaic Modules
K-19: The Effect of Rapid Heat Treatment on Crystal Defect Evolution and Electrical Properties of the Original High Efficient Polycrystalline Silicon
Removal Impurities from Metallurgical Silicon by Slag Treatment Combined with Acid Leaching
Review of Solar Silicon Recycling
Solar Silicon by Direct Carbothermic Reduction - Review and Outlook
Structure Nature of Boron Removal from Silicon in Slagging Refining: A Raman Spectroscopy and NMR Spectroscopy Study
The Mechanism of Boron Removal from Silicon Alloy by Electric Field Using Slag Treatment
Thermo-Calc of the Phase Diagram of Calcium Silicon (Ca-Si) System
Thermo-Calc of the Phase Diagram of the Fe-Si System
Three-dimensional Crystal-plasticity based Model for Intrinsic Stresses in Multi-junction Photovoltaic

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