|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Solar Cell Silicon
||Particle Separation in Silicon Ingot Casting Using AC Magnetic Field
||Valdis Bojarevics, Georgi Djambazov, Koulis Pericleous
|On-Site Speaker (Planned)
The AC electromagnetic (EM) field effects are investigated for the transport and possible extraction of particles (impurities, precipitates, oxides, bubbles, etc.) in molten silicon during the directional solidification of silicon ingot. The dynamics of particles are affected by the hydrodynamic drag, buoyancy, turbulent fluctuations and the EM force via the local pressure distribution. The EM force leads to high mixing rates, transitional flow structures and an intense turbulence of the melt, contributing to the particle dispersion, transport and possibly separation to a desired location. Application to silicon kerf loss recycling by remelting and solidifying in the presence of AC EM field is presented for a variety of cases using 3d models for general flow structure and axisymmetric models for moving solidification front long time tracking. This paper demonstrates the effects of flow on the time dependent particle ‘swarm’ like transport and the eventual modified distribution in the final ingot.
||Planned: Stand-alone book in which only your symposium’s papers would appear (indicate title in comments section below)