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首页> 外文期刊>Journal of Crystal Growth >Numerical investigation of the effect of a crucible cover on crystal growth in the industrial directional solidification process for silicon ingots
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Numerical investigation of the effect of a crucible cover on crystal growth in the industrial directional solidification process for silicon ingots

机译：硅锭工业定向凝固过程中坩埚盖对晶体生长影响的数值研究

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摘要

We carried out transient global simulations of heating, melting, growing, annealing and cooling stages for the industrial directional solidification (DS) process. Two separate DS processes were performed with a covered crucible and an uncovered crucible to investigate the effect of a crucible cover on global heat transfer and silicon crystal growth. It is found that the cover blocks heat transfer from the heaters to the silicon domain significantly, and therefore influences the crystal growth through the entire DS process. For the melting of silicon feedstock, covering the crucible can lead to a significant increase in melting time, whereas it has little effect on the melting sequence. During the growing stage, the solidification time for the process with a crucible cover is much shorter than the process without a cover. The cover can also influence the melt convection near the free surface center, but it hardly changes the melt flow pattern deep in the crucible. For the annealing and cooling processes, heat transfer is not significantly affected by covering the crucible and the isotherm shapes in the silicon ingots are similar with and without a cover.
机译：我们对工业定向凝固（DS）工艺的加热，熔融，生长，退火和冷却阶段进行了瞬态全局模拟。用有盖的坩埚和无盖的坩埚进行了两个单独的DS工艺，以研究坩埚盖对整体传热和硅晶体生长的影响。已经发现，盖显着地阻止了从加热器到硅域的热传递，因此在整个DS过程中影响了晶体的生长。对于硅原料的熔化，覆盖坩埚会导致熔化时间显着增加，而对熔化顺序的影响很小。在生长阶段，带有坩埚盖的过程的固化时间比没有盖的过程要短得多。覆盖层还会影响自由表面中心附近的熔体对流，但几乎不会改变坩埚深处的熔体流动模式。对于退火和冷却过程，通过覆盖坩埚不会显着影响传热，并且硅锭的等温线形状在有盖和无盖的情况下都相似。

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  • 来源
    《Journal of Crystal Growth》 |2014年第1期|291-295|共5页
  • 作者

    Zaoyang Li; Yunfeng Zhang; Zhiyan Hu; Genshu Zhou; Lijun Liu;

  • 作者单位

    Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education, School of Energy and Power Engineering, Xi'an jiaotong University, Xi'an, Shaanxi 710049, China,State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China;

    Yingli Green Energy Holding Co., Ltd., Baoding, Hebei 071051, China;

    Yingli Green Energy Holding Co., Ltd., Baoding, Hebei 071051, China;

    State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China;

    Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education, School of Energy and Power Engineering, Xi'an jiaotong University, Xi'an, Shaanxi 710049, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    A1. Computer simulation; A1. Heat transfer; A1. Directional solidification; B3. Solar cells;

    机译：A1。计算机仿真;A1。传播热量;A1。定向凝固;B3。太阳能电池;

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