vacuum distillation refining of metallurgical grade silicon

Vacuum distillation refining of metallurgical grade

Vacuum distillation refining of metallurgical grade silicon(Ⅰ)——Thermodynamics on removal of phosphorus from metallurgical grade silicon 魏奎先 马文会 戴永年 杨斌 刘大春 汪镜福

Vacuum Refining of Molten Silicon - Metallurgical and ...

2012-9-26 · Metallurgical grade silicon (MG-Si) is commercially produced through the reduction of silicon oxide with carbon in submerged arc furnaces.[] MG-Si is the initial material to produce pure silicon for electronics applications. The minimum required purity of silicon for photovoltaic applications and that for silicon wafers used in the semiconductor industry are, respectively, 6 N and 9 N.

Phosphorus removal from upgraded metallurgical-grade ...

2017-12-1 · Vacuum distillation refining of metallurgical grade silicon (Ⅰ) —thermodynamics on removal of phosphorus from metallurgical grade silicon Trans. Nonferrous Met. Soc. China , 17 (

Processes for Upgrading Metallurgical Grade Silicon to ...

2012-1-1 · Phosphorus is the main element removed through vacuum distillation due to its much higher vapour pressure which gives large -value. However, the removal of other volatile impurities such as Al, Ca, Mg, the silicon melt affects the P removal rate and it is faster from cleaner melts [27]. ... Dietle J. Refining of metallurgical-grade silicon ...

Phosphorus removal from upgraded metallurgical-grade ...

Vacuum refining under the atmospheres of 8.0×10⁻³∼3.6×10⁻² Pa was applied for removing phosphorus, aluminium and calcium in metallurgical grade silicon (MG-Si) at 1722∼1915 K, and the ...

Refining Silicon | PVEducation

2021-8-20 · A small amount of the metallurgical grade silicon is further refined for the semiconductor industry. Powdered MG-Si is reacted with anhydrous HCl at 300 °C in a fluidized bed reactor to form SiHCl 3 Si + 3HCl → SiHCl 3 + H 2 During this reaction impurities such as Fe, Al, and B react to form their halides (e.g. FeCl 3, AlCl 3, and

(PDF) Processes for Upgrading Metallurgical Grade Silicon ...

New metallurgical refining process of Solar Grade Silicon (SOG) feedstock reach to 7N is developed. The process consists of B reduction by oxidation, P reduction by vacuum and metal reduction by ...

Refining and Recycling of Silicon: A Review

2015-6-10 · of metallurgical grade silicon, also called silicon metal in the industry because of its appearance and not because of its physical properties, are produced and sold in the world market.

魏奎先,男,副教授,硕士生导师 - kmust.edu.cn

2016-9-12 · Vacuum Distillation Refining of Metallurgical Grade Silicon (Ⅰ)——Thermodynamics on Removal Phosphorus from Metallurgical Grade Silicon.

Vacuum refining of silicon at ultra-high temperatures ...

2021-2-1 · Vacuum refining is a very efficient process for P removal from Si, and it is commercialized recently for the production of SoG-Si . Phosphorus removal from Si by vacuum refining has been the subject of many researches since the early 1990s [10,, , , , , , , ]. The thermochemistry and kinetics of P evaporation from Si melt have been studied.

Vacuum Refining of Molten Silicon - Springer

2017-8-25 · Metallurgical grade silicon contains around 99 wt pct silicon, and its impurities are generated from the raw ... principle of crude metal vacuum distillation. The vapor pressures of selected pure substances between 1673 K and 2273 K (1400 C and 2000 C) were ... REFINING OF SILICON In vacuum refining process, a volatile solute element ...

Exergy Analysis of Metallurgical-grade Silicon in Vacuum ...

2018-1-30 · Exergy Analysis of Metallurgical-grade Silicon in Vacuum Induction Refining Process. Mingyu Zhang 1, Xi Yang 1, Guoqiang Lv 2 and Wenhui Ma 2. Published under licence by IOP Publishing Ltd IOP Conference Series: Earth and Environmental Science, Volume 108, 1. Material Application and Chemical Engineering

Refining Silicon | PVEducation

2021-8-20 · The silica is reduced (oxygen removed) through a reaction with carbon in the form of coal, charcoal and heating to 1500-2000 °C in an electrode arc furnace. SiO 2 + C → Si + CO 2. The resulting silicon is metallurgical grade silicon (MG-Si). It is 98% pure and is used extensively in the metallurgical

Electromagnetic Levitation Refining of Silicon–Iron Alloys ...

2017-2-10 · Vacuum distillation refining of metallurgical grade silicon (I)—Thermodynamics on removal of phosphorus from metallurgical grade silicon. Transactions of Nonferrous Metals Society of China, 17, 1022–1025. CrossRef Google Scholar. 12. Khajavi, L. T., & Barati, M. (2012). Thermodynamics of phosphorus removal from silicon in solvent refining ...

Refining and Recycling of Silicon: A Review

2015-6-10 · of metallurgical grade silicon, also called silicon metal in the industry because of its appearance and not because of its physical properties, are produced and sold in the world market.

Refining Metallurgical Grade Silicon by Chlorination ...

2014-6-18 · A supply shortage of solar-grade silicon in recent years resulted from a rapid expansion of the solar cell industry. Therefore, many efforts have been done to obtain reliable metallurgical methods for production of SoG silicon from metallurgical grade silicon. In this research, refining of metallurgical grade silicon by chlorination treatment with

魏奎先,男,副教授,硕士生导师 - kmust.edu.cn

2016-9-12 · Vacuum distillation refining of metallurgical grade silicon (II) - Kinetics on removal of phosphorus from metallurgical grade silicon.Transactions of Nonferrous Metals Society of China, 2007, 17: s1026-s1029.

Purification of metallurgical-grade silicon combining Sn ...

2020-3-20 · In this study, the purification of metallurgical-grade silicon using a combination of solvent refining and gas pressure filtration was investigated in the Sn–Si alloy. After the solvent refining process, the silicon was separated from the solvent by gas pressure filtration. The effects of

Evaporation Behavior of Phosphorus from Metallurgical ...

2015-11-18 · Phosphorus removal from metallurgical grade silicon by CaO-SiO 2-CaCl 2 slag treatment, HCl leaching, and vacuum refining was investigated. The effect of different compositions of slag was evaluated. The calcium concentration in slag-treated silicon increased with increasing CaO/SiO 2 mass ratio of slag, decreasing the evaporation efficiency of phosphorus in molten silicon.

7.10: Semiconductor Grade Silicon - Chemistry LibreTexts

2020-9-8 · Metallurgical-grade silicon (MGS) The typical source material for commercial production of elemental silicon is quartzite gravel; a relatively pure form of sand (SiO 2).The first step in the synthesis of silicon is the melting and reduction of the silica in a submerged-electrode arc furnace.

Exergy Analysis of Metallurgical-grade Silicon in Vacuum ...

2018-1-30 · Exergy Analysis of Metallurgical-grade Silicon in Vacuum Induction Refining Process. Mingyu Zhang 1, Xi Yang 1, Guoqiang Lv 2 and Wenhui Ma 2. Published under licence by IOP Publishing Ltd IOP Conference Series: Earth and Environmental Science, Volume 108, 1. Material Application and Chemical Engineering

26th European Photovoltaic Solar energy conference and ...

2012-1-10 · Keywords: Impurities, metallurgical grade, silicon, vacuum, refining . 1 INTRODUCTION . Vacuum distillation technique for the purification of molten metals and alloys has been developed mainly in the last century. This technique can be used to remove for

Structural features of high purity silicon prepared by ...

2011-11-6 · A study of the structure of high purity polycrystalline silicon, prepared by electron beam refining of metallurgical-grade silicon in a vacuum is provided. Results of the study point to sensitivity of impurity particle growth and dimensions to metallurgical-grade silicon refining method (vacuum or oxidation), in contrast to crystallite dimensions. There is also almost total absence of impurity ...

Advances in the refining of metallurgical-grade silicon ...

OSTI.GOV Conference: Advances in the refining of metallurgical-grade silicon. Advances in the refining of metallurgical-grade silicon

Refining Metallurgical Grade Silicon by Chlorination ...

2014-6-18 · A supply shortage of solar-grade silicon in recent years resulted from a rapid expansion of the solar cell industry. Therefore, many efforts have been done to obtain reliable metallurgical methods for production of SoG silicon from metallurgical grade silicon. In this research, refining of metallurgical grade silicon by chlorination treatment with

Removal of Phosphorus from Silicon Melts by Vacuum

2013-8-23 · silicon melts. This work is of interest for the production of solar-grade silicon since phosphorus is hard to remove from silicon and is an important impurity in solar cells. The primary objective of the testwork was to study the effect of iron on phosphorus removal from silicon via induction vacuum refining.

Development of solar grade silicon refining via ...

As a new promising route for solar grade silicon (SOG-Si) production, metallurgical refining processes was developed in the early eighties of the last century, followed by the establishment of NEDO-JFE process in the beginning of the 2000s, where P was removed by electron beam (EB) in vacuum conditions and B by Ar-H2O plasma.

Purification of metallurgical-grade silicon combining Sn ...

2020-3-20 · In this study, the purification of metallurgical-grade silicon using a combination of solvent refining and gas pressure filtration was investigated in the Sn–Si alloy. After the solvent refining process, the silicon was separated from the solvent by gas pressure filtration. The effects of

7.10: Semiconductor Grade Silicon - Chemistry LibreTexts

2020-9-8 · Metallurgical-grade silicon (MGS) The typical source material for commercial production of elemental silicon is quartzite gravel; a relatively pure form of sand (SiO 2).The first step in the synthesis of silicon is the melting and reduction of the silica in a submerged-electrode arc furnace.

Upgrading of Metallurgical Grade Silicon (MG-Si) Using

Locally produced metallurgical grade silicon (MG-Si ~ 97%) was upgraded by using wet-milling process. This is including milling of MG-Si in presence of 2 M HCl solution for different time periods ...

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