کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1791453 1524469 2012 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of argon flow on melt convection and interface shape in a directional solidification process for an industrial-size solar silicon ingot
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Effects of argon flow on melt convection and interface shape in a directional solidification process for an industrial-size solar silicon ingot
چکیده انگلیسی

We carried out global simulations of heat transfer to investigate the argon flow effect on the melt convection and melt–crystal (m–c) interface shape at different stages of an industrial directional solidification (DS) process for the multi-crystalline silicon (mc-Si) ingot. We found that the convective heat transfer at the melt free surface due to the argon flow significantly changed the temperature distribution in the upper layer of the silicon melt. The shear stress caused by the argon flow along the melt free surface increases with an increase in argon flow rate. The melt flow pattern under the central area of the free surface changes accordingly. The argon flow has little impact on the m–c interface shape at the early stage of the DS process. At the middle stage, the m–c interface shape is mainly influenced by the pattern and intensity of the melt convection, which are modified by the argon flow. It is less convex to the melt with a larger argon flow rate. However, the m–c interface is more convex to the melt with an increase in argon flow rate at the final stage of the DS process, because it is then directly affected by the cooling effect of the gas flow.


► We studied the argon flow effects on the melt convection and m–c interface shape.
► Argon cools the silicon melt and influences its intensity and flow pattern.
► Argon has little impact on m–c interface at early stage of the DS process.
► M–c interface is less convex to the melt with larger argon flow rate at the middle stage.
► M–c interface is more convex to melt with larger argon flow rate at the final stage.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Crystal Growth - Volume 360, 1 December 2012, Pages 87–91
نویسندگان
, , , , ,