Characterization of SiC and Si3N4 inclusions in solar cell Si scraps and their motion at the Si/slag interface

被引：5

作者：

Li, Yaqiong ^{[1
]}

Pan, Di ^{[2
]}

Zhang, Lifeng ^{[3
]}

Duan, Haojian ^{[1
]}

Lei, Xunhui ^{[4
]}

Chen, Wei ^{[5
]}

Li, Jiayan ^{[2
]}

机构：

[1] Univ Sci & Technol Beijing, Sch Met & Ecol Engn, Beijing 100083, Peoples R China

[2] Dalian Univ Technol, Sch Mat Sci & Engn, Dalian 116024, Peoples R China

[3] North China Univ Technol, Sch Mech & Mat Engn, Beijing 100144, Peoples R China

[4] MCC CISDI Engn Co Ltd, Prod Operat Serv Dept, Chongqing 401120, Peoples R China

[5] Yanshan Univ, Sch Mech Engn, Qinhuangdao 066004, Hebei, Peoples R China

来源：

JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T | 2022年 / 17卷

基金：

中国国家自然科学基金;

关键词：

Si3N4; SiC; Slag refining; Solar cell Si scraps; Si/slag interface; DIRECTIONAL SOLIDIFICATION; MULTICRYSTALLINE SILICON; MOLTEN SILICON; PARTICLES; AGGLOMERATION; COLLISION; SURFACE;

D O I：

10.1016/j.jmrt.2022.01.157

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The separation of SiC and Si3N4 inclusions from solar cell Si scraps to the slag phase during slag refining is essential to the recovery and production of high-purity Si. This study characterized the SiC and Si3N4 inclusions in solar cell Si scraps, which formed large clusters with complex shapes. According to the experimental and theoretical investigations, the inclusions with large diameters were found to be conducive to passing through the Si/slag interface and then being retained in the slag phase. The favorable conditions such as positive overall wettability, high operating temperature, low viscosity slag, and prolonged-time can promote the small inclusion removal from molten Si scraps. (C) 2022 The Author(s). Published by Elsevier B.V.

引用

页码：2220 / 2228

页数：9

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