Numerical study of the influence of different types of magnetic fields on the interface shape in directional solidification of multi-crystalline silicon ingots

✍ Scribed by C. Tanasie; D. Vizman; J. Friedrich

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 754 KB
• Volume: 318
• Category: Article
• ISSN: 0022-0248
• DOI: 10.1016/j.jcrysgro.2010.11.034

✦ Synopsis

Numerical simulations were carried out in order to study the effect of various types of magnetic fields (steady vertical and horizontal magnetic fields and a combination of a steady field and DC electric current) on melt convection and interface shape during directional solidification of multi-crystalline silicon ingots. It is shown that steady magnetic fields can decrease the interface deflection. The electromagnetic field produced by the combination of DC current through the melt and a steady magnetic field can produce a stirring effect in the melt for a relatively small value of magnetic field and electrical current. Consequently, a more uniform distribution of dopants and impurities can be obtained in the silicon crystals. The melt rotation rate can be easily controlled by the intensity of the electrical current.