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Preparation of Crystalline Silicon by Magnesiothermic Reduction Combined Acid Etching Routes from Silica Fume
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Yongcheng HUANG1, Zhining CHEN1, Lin ZHANG1, Xiao REN1, Yuzhong GUO1, Ruian HUANG2, Bin LI3
Journal of the Chinese Ceramic Society | 2020, 48(10) : 1589 - 1596
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Journal of the Chinese Ceramic Society | 2020, 48(10): 1589-1596
Preparation of Crystalline Silicon by Magnesiothermic Reduction Combined Acid Etching Routes from Silica Fume
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Yongcheng HUANG1, Zhining CHEN1, Lin ZHANG1, Xiao REN1, Yuzhong GUO1, Ruian HUANG2, Bin LI3
Affiliations
  • 1.Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
  • 2.National Engineering Laboratory for Vacuum Metallurgy, Kunming University of Science and Technology, Kunming 650093, China
  • 3.Ganzhou Xinlong New Energy Material Co., Ltd. Ganzhou 341000, Jiangxi, China

    • HUANG Yongcheng (1994-), male, Master candidate. E-mail:

About Author:

HUANG Yongcheng (1994-), male, Master candidate. E-mail:

Published: 2020-10-20 doi: 10.14062/j.issn.0454-5648.20200071
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Silica fume (SF, containing SiO2>85%, in mass fraction) collected from emitting soot of silicon-metallurgical workshop was used as a raw material for preparation of pure crystalline silicon. Silicon was prepared via refining pretreatment of pristine SF and ball-milling mixing to make magnesium and SF powder reactant, subsequent magnesiothermic reduction reaction (MRR) process and final purification by two-step acid-etching treatment of HCl-HF acids. The experimental results show that a core-shell structure Mg@SiO2, i.e., Mg particles coated uniformly by a dense layer of submicron-sized primary particles of silica fume in a desired stoichiometric ratio of reactants Mg:SiO2 of 0.85∶1.00, is formed via micron-scale diffusion reaction after mixing for 12 h at a rotational speed of 150 r/min. A high-performance route of MRR was proposed based on the wrapping-micron-reactor model. The extent of MRR is as high as 96% and Si species of HCl-etched sample are more than 90% (in mass fraction), and the final prepared product of crystalline silicon achieves a purity of 99.88% (in mass fraction) after HF+CH3COOH acid-etching.

silica fume  /  crystalline silicon  /  magnesiothermic reduction reaction  /  combined acid etching  /  wrapping-microreactor
黄永成, 陈志柠, 张林, 任晓, 郭玉忠, 黄瑞安, 李斌. 采用镁热还原-复合酸浸法从微硅粉制备晶体硅. 硅酸盐学报, 2020 , 48 (10) : 1589 -1596 . DOI: 10.14062/j.issn.0454-5648.20200071
Yongcheng HUANG, Zhining CHEN, Lin ZHANG, Xiao REN, Yuzhong GUO, Ruian HUANG, Bin LI. Preparation of Crystalline Silicon by Magnesiothermic Reduction Combined Acid Etching Routes from Silica Fume[J]. Journal of the Chinese Ceramic Society, 2020 , 48 (10) : 1589 -1596 . DOI: 10.14062/j.issn.0454-5648.20200071
Appendix
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Year 2020 volume 48 Issue 10
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Article Info
doi: 10.14062/j.issn.0454-5648.20200071
  • Receive Date：2020-02-14
  • Online Date：2026-10-29
  • Published：2020-10-20
Article Data
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History
  • Received：2020-02-14
  • Revised：2020-03-28
Funding
Affiliations
    1.Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
    2.National Engineering Laboratory for Vacuum Metallurgy, Kunming University of Science and Technology, Kunming 650093, China
    3.Ganzhou Xinlong New Energy Material Co., Ltd. Ganzhou 341000, Jiangxi, China

Corresponding:

GUO Yuzhong (1962-), male, Ph.D., Professor; E-mail:
HUANG Ruian (1973-), male, Ph.D., Associate Professor.
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
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Genus		 种数
Number of
species		 占总种数比例
Percentage of total
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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