Effect of Al concentration on the phase composition of typical impurities during industrial silicon smelting

IF 6.3 2区材料科学 Q2 ENERGY & FUELS

Solar Energy Materials and Solar Cells Pub Date : 2025-09-23 DOI:10.1016/j.solmat.2025.113976

Yaopan Hu , Zhengjie Chen , Wenhui Ma , Jijun Wu , Junyu Qu , Xiaowei Gan

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引用次数: 0

Abstract

During the industrial silicon refining process, impurities can affect the selectivity and activity of organic silicon monomer synthesis. This study utilized the simplified molecular interaction volume model (MIVM) alongside actual production data and samples to investigate the effects of different aluminum concentrations on typical impurity phases in industrial silicon. et al. concentrations of 1500–1600 ppmw, the Si₇Al₈Fe₅ phase emerges. As the Al concentration increases to 1700 ppmw, the Si₂Al₃Fe phase forms. The FeSi₂, Si₈Al₆Fe₄Ca, and FeTiSi₂ phases are consistently present in industrial silicon. MIVM predictions indicate that the activities of Fe, Ti, and Ca increase with increasing Al concentration, consistent with the actual production trend. However, production data suggest that this correlation is limited under certain conditions. Moreover, MIVM is used to predict the interactions among impurities in industrial silicon. The effects of Al concentration on typical impurity phases in industrial silicon are elucidated using MIVM combined with actual production data. Proper control of Al concentration facilitates the efficient synthesis of organosilicon monomers, increases their yield, and reduces energy consumption. These findings provide a theoretical and technical basis for controlling impurities in organosilicon monomer synthesis.

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铝浓度对工业硅冶炼中典型杂质物相组成的影响

在工业硅精制过程中，杂质会影响有机硅单体合成的选择性和活性。本研究利用简化分子相互作用体积模型（MIVM）结合实际生产数据和样品，研究了不同铝浓度对工业硅中典型杂质相的影响。浓度为1500-1600 ppmw时，Si7Al8Fe5相出现。当Al浓度增加到1700 ppmw时，Si2Al3Fe相形成。FeSi2、Si8Al6Fe4Ca和FeTiSi2相一直存在于工业硅中。MIVM预测表明，随着Al浓度的增加，Fe、Ti和Ca的活性增加，与实际生产趋势一致。然而，生产数据表明，这种相关性在某些条件下是有限的。此外，MIVM还用于预测工业硅中杂质之间的相互作用。结合实际生产数据，利用MIVM分析了Al浓度对工业硅中典型杂质相的影响。适当控制铝浓度有利于有机硅单体的高效合成，提高了有机硅单体的产率，降低了有机硅单体的能耗。这些发现为有机硅单体合成中杂质的控制提供了理论和技术依据。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Solar Energy Materials and Solar Cells 工程技术-材料科学：综合

CiteScore

12.60

自引率

11.60%

发文量

513

审稿时长

47 days

期刊介绍： Solar Energy Materials & Solar Cells is intended as a vehicle for the dissemination of research results on materials science and technology related to photovoltaic, photothermal and photoelectrochemical solar energy conversion. Materials science is taken in the broadest possible sense and encompasses physics, chemistry, optics, materials fabrication and analysis for all types of materials.