Flow Characteristics of Conductive Silicon Melt Under Inherent Magnetic Field in Directional Solidification

LI Zaoyang; LIU Wenchao; ZHOU Liangyu; LIU Lijun; WANG Yue

doi:10.7652/xjtuxb202205007

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Flow Characteristics of Conductive Silicon Melt Under Inherent Magnetic Field in Directional Solidification

更新时间：2025-07-09

- Flow Characteristics of Conductive Silicon Melt Under Inherent Magnetic Field in Directional Solidification
- Vol. 56, Issue 5, Pages: 64-73(2022)
- 作者机构：
  
  1. 西安交通大学能源与动力工程学院,西安,710049
  2. 泰州英格伟精密机械有限公司,江苏,泰州,225300
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202205007
  CLC： O781;TK121
- Online First：10 May 2022，
  
  Published：2022
- 稿件说明：
移动端阅览
LI Zaoyang, LIU Wenchao, ZHOU Liangyu, et al. Flow Characteristics of Conductive Silicon Melt Under Inherent Magnetic Field in Directional Solidification[J]. 2022, 56(5): 64-73.
DOI：

LI Zaoyang, LIU Wenchao, ZHOU Liangyu, et al. Flow Characteristics of Conductive Silicon Melt Under Inherent Magnetic Field in Directional Solidification[J]. 2022, 56(5): 64-73. DOI： 10.7652/xjtuxb202205007.

摘要

以定向凝固法生长硅晶体为例

针对加热器生成固有磁场作用下导电硅熔体的流动特性开展数值模拟研究。首先计算获得了不同加热电流接入方式下熔体区域洛伦兹力的大小与方向分布

进而研究了洛伦兹力驱动下熔体流动的结构与强度。结果表明

导电硅熔体中加热器生成固有磁场的磁感应强度约为10

-3

T、感应电流密度约为10

A/m

、最大洛伦兹力可达12 N/m

大的洛伦兹力主要分布在熔体的上部和侧部表面附近区域

能够驱动熔体流动呈现强烈的三维特征

改变加热电流的接入方式能够显著影响洛伦兹力的空间分布及熔体的流动特性。相关研究有助于深入认识加热器的加热与磁场控制双重功能

有助于实现对导电熔体流动和定向凝固过程的精确控制。

Abstract

Numerical simulation is used to study the influence of the heater-generated inherent magnetic field on the conductive silicon melt flow in the directional solidification(DS)of multi-crystalline silicon crystals. The magnitude and direction characteristics of the Lorentz force in the melt for different heating current connection modes are calculated

and then the pattern and intensity of the melt flow driven by the Lorentz force are studied. Results show that the induction intensity of the inherent magnetic field generated by the heater is about 10

-3

the induced current density is about 10

A/m

and the maximum Lorentz force is up to 12 N/m

. Large Lorentz force is mainly distributed i

n the upper and side regions of the melt and it can drive the melt flow to present strong three-dimensional characteristics. Adjusting the heating current connection mode can significantly influence the Lorentz force distribution and the melt flow. This research provides a reference for the deep understanding of the dual functions of the heater

i.e.

heating and magnetic field control

and for the realization of precise control of the melt flow during DS process.

关键词

Keywords

references

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