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Vacuum Distillation Refining Of Metallurgical Grade Silicon

silicon germanium semiconductor

silicon germanium semiconductor

Lattice Materials Custom Machined Silicon and Germanium . Lattice Materials is the leading U.S. manufacturer of silicon and germanium infrared optics, semiconductor parts, laser mirrors, thin film targets and more.

Processes for Upgrading Metallurgical Grade Silicon to .

Processes for Upgrading Metallurgical Grade Silicon to .

The global shortage of solar grade silicon for the production of photovoltaic cells has motivated many re-searches on the refining of silicon, especially the refining of metallurgical-grade silicon.

ysxb.csu.edu.cn

ysxb.csu.edu.cn

Abstract: The kinetics on vacuum refining process of metallurgical grade silicon was studied using maximum evaporation rate, critical pressure and mean free path of phosphorus in the metallurgical grade silicon at different temperatures. The behaviors of impurity phosphorus in the vacuum distillation process were examined in detail.

Calcium removal in purifying metallurgical-grade silicon .

Calcium removal in purifying metallurgical-grade silicon .

The kinetics on vacuum refining process of metallurgical grade silicon was studied using maximum evaporation rate, critical pressure and mean free path of phosphorus in the metallurgical grade .

Purification of crude selenium by vacuum distillation and .

Purification of crude selenium by vacuum distillation and .

In this study, metallurgical grade crude selenium (99.4%), comprehensively recovered from copper electrolysis anode slime, was purified to 99.992% through triple consecutive vacuum distillation (TCVD) on a laboratory scale.

Metallurgist | Article about metallurgist by The Free .

Metallurgist | Article about metallurgist by The Free .

Modern metallurgical research is concerned with the preparation of radioactive metals, with obtaining metals economically from low-grade ores, with obtaining and refining rare metals hitherto not used, and with the formulation of alloys.

Electromagnetic Levitation Refining of Silicon–Iron Alloys .

Electromagnetic Levitation Refining of Silicon–Iron Alloys .

Feb 10, 2017 · 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 .

Cheaper Silicon for Photovoltaics: Siemens Process vs .

Cheaper Silicon for Photovoltaics: Siemens Process vs .

Jun 27, 2018 · Producing Metallurgical Grade Silicon. In most cases, the silicon used for solar cells is derived from metallurgical grade silicon. This metallurgical grade silicon is produced by reducing silica from quartz sand with carbon: SiO2(l)+2C(s)=Si(l)+2CO(g). Next, carbon electrodes are often used in a furnace to create temperatures of around 2000°C, so that many impurities become volatile.

Silicon Substrate Preparation-Czochralski Crystal Growth .

Silicon Substrate Preparation-Czochralski Crystal Growth .

The process starts by the production of Metallurgical Grade Silicon (MGS) by charging it with quartzite and carbon in an arc furnace. Quartzite is a relatively pure form of sand (SiQ2), and carbon is obtained in the form of coal, coke, and wood chips.

Physics and Material Science of Semiconductor .

Physics and Material Science of Semiconductor .

metallurgical grade silicon (MGS) by heating silica with carbon (97% pure) . crucible under vacuum or inert gas and a seed crystal is dipped into the melt • The seed crystal is slowly withdrawn . (sand) through refining, fractional distillation .

Silicon wafers, silicon wafer processing and related .

Silicon wafers, silicon wafer processing and related .

In zone melting, also called zone refining, the first silicon purification method to be widely used industrially, rods of metallurgical grade silicon are heated to melt at one end. Then, the heater is slowly moved down the length of the rod, keeping a small length of the rod molten as the silicon cools and re-solidifies behind it.

23.2: Principles of Extractive Metallurgy - Chemistry .

23.2: Principles of Extractive Metallurgy - Chemistry .

Sep 18, 2019 · Refining. The impurities contained in the metal product of the roasting/reduction process are removed. For example, the (Zn(l)) produced in the reduction process often contains impurities of Cd and Pb. Though fractional distillation of Zn(l) will work in the refining .

Vacuum Refining of Molten Silicon | SpringerLink

Vacuum Refining of Molten Silicon | SpringerLink

Sep 26, 2012 · Metallurgical fundamentals for vacuum refining of molten silicon and the behavior of different impurities in this process are studied. A novel mass transfer model for the removal of volatile impurities from silicon in vacuum induction refining is developed. The boundary conditions for vacuum refining system—the equilibrium partial pressures of the dissolved elements and their actual partial .

Thermodynamics of solar-grade-silicon refining - ScienceDirect

Thermodynamics of solar-grade-silicon refining - ScienceDirect

Using relatively inexpensive metallurgical grade silicon (MG-Si) as a starting material for making solar grade silicon (SOG-Si) is believed to be one of the ways to make solar cells less expensive. Impurities in MG-Si will shorten the lifetime of excited carriers in silicon solar cell and disturb electric generation.

US20080123715A1 - Silicon Refining Installation - Google .

US20080123715A1 - Silicon Refining Installation - Google .

US20080123715A1 US11/628,766 US62876605A US2008123715A1 US 20080123715 A1 US20080123715 A1 US 20080123715A1 US 62876605 A US62876605 A US 62876605A US 2008123715 A1 US2008123715 A1 US 2008123715A1 Authority US United States Prior art keywords crucible silicon .

Purification of metallurgical-grade silicon combining Sn .

Purification of metallurgical-grade silicon combining Sn .

The high consumption of chemical energy is inevitable in the Siemens process, because the conversion of metallurgical-grade silicon (MG-Si) to gaseous compounds is followed by distillation, reduction, and deposition into high-purity silicon. 1 Therefore, metallurgical refining, a promising process for producing SoG-Si, has gradually become a .

Refining Silicon | PVEducation

Refining Silicon | PVEducation

The impurity levels in metallurgical grade silicon5 vary widely due to process variation and the source raw materials of silica and carbon. Electronic Grade Silicon. 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 .

Precipitation Phase and Impurities Distribution of .

Precipitation Phase and Impurities Distribution of .

Precipitation phase and impurities distribution of MG-silicon were investigated by vacuum refining followed by slag treatment, and the CaO-SiO2-CaF2 system was adopted for slag treatment. Contrasting the microstructure of precipitated phase in slag treatment with and without vacuum refining pretreated, it could be concluded that the composition of precipitated phases, obtained in MG-Si after .

Purification of metallurgical-grade silicon combining Sn .

Purification of metallurgical-grade silicon combining Sn .

The high consumption of chemical energy is inevitable in the Siemens process, because the conversion of metallurgical-grade silicon (MG-Si) to gaseous compounds is followed by distillation, reduction, and deposition into high-purity silicon. 1 Therefore, metallurgical refining, a promising process for producing SoG-Si, has gradually become a .

ysxb.csu.edu.cn

ysxb.csu.edu.cn

A new method for production of solar grade silicon(SoG-Si) at low cost from metallurgical grade silicon (MG-Si) via vacuum metallurgical technique was proposed, which is a promising process to feedstock solar energy silicon material independence of traditional Siemens method.

Semiconductor Manufacturing Techniques | Solid-state .

Semiconductor Manufacturing Techniques | Solid-state .

Such metallurgical grade silicon is suitable for use in silicon steel transformer laminations, but not nearly pure enough for semiconductor applications. Conversion to the chloride SiCl 4 (or SiHCl 3) allows purification by fractional distillation. Reduction by ultrapure zinc or magnesium yields sponge silicon, requiring further purification.

NIOBIUM AND VANADIUM REFINING ON AN INDUSTRIAL .

NIOBIUM AND VANADIUM REFINING ON AN INDUSTRIAL .

The program at the U.S. Bureau of Mines has involved the extraction and purification of niobium from the complex mineral euxenite, which is native to the United States, and from niobium and tantalum bearing metallurgical .

Refining Silicon | PVEducation

Refining Silicon | PVEducation

The resulting silicon is metallurgical grade silicon (MG-Si). It is 98% pure and is used extensively in the metallurgical industry. An even greater production of silicon is in the form of ferrosilicon that is manufactured using a similar process to that described above but is done in the presence of iron.

Kinetics of evaporation under vacuum in preparation of .

Kinetics of evaporation under vacuum in preparation of .

A sires of silicon refining experiments were carried out in a lab-scale EBM equipment, which primarily consists of the following components: a furnace chamber with a volume of about 1 m 3, a vacuum pump system which can make the pressure to about 5 × 10 −2 Pa, an electron gun with a maximum power of 30 kW, a button-shape water-cooled copper .

The 18th International Vacuum Conference (IVC-18)

The 18th International Vacuum Conference (IVC-18)

Vacuum distillation as an effective purification method has been used in the preparation of high-purity bismuth [14] and the refining of the metallurgical grade silicon [15,16], etc. But the purification of crude nickel by vacuum distillation has not been reported. In this paper the purification of crude nickel by vacuum distillation .

Phosphorus removal from upgraded metallurgical-grade .

Phosphorus removal from upgraded metallurgical-grade .

1. Introduction. Phosphorus is a typical nonmetallic impurity in silicon that deteriorates silicon performance; the required maximum phosphorus content is 0.1 × 10 −6 for solar-grade silicon (SOG-Si) .In general, different impurities can be removed by metallurgical routes with methods based on the characteristics of various impurities in metallurgical-grade silicon .

Preparation of Si-SiOx nanoparticles from volatile residue .

Preparation of Si-SiOx nanoparticles from volatile residue .

Preparation of Si-SiO x nanoparticles from volatile residue produced by refining of silicon. . et al.Vacuum Distillation refining of metallurgical grade silicon (Ⅰ)-thermodynamics on removal of phosphorus from metallurgical grade silicon. T. Nonferr. Metal. Soc., 17 (2007), pp. 1022-1025.

Processes for Upgrading Metallurgical Grade Silicon to .

Processes for Upgrading Metallurgical Grade Silicon to .

Ji-Jun W, Wen-hui M, Bin Y, Yong-nian D, Morita K. Boron removal from metallurgical grade silicon by oxidizing refining. Trans. Nonferrous Met. China 2009; 19: 463.467. [32] Alemany C, Trassy C, Pateyron B, Li KI, Delannoy Y. Refining of metallurgical-grade silicon by inductive plasma. Solar Energy Materials & Solar Cells 2002; 72: 21-48. [33]

Metallurgy | Article about metallurgy by The Free Dictionary

Metallurgy | Article about metallurgy by The Free Dictionary

Metallurgical processes are also used in the production of semiconductors and nonmetals (silicon, germanium, selenium, tellurium, arsenic, phosphorus, and sulfur), some of which are obtained as byproducts in metal refining. On the whole, modern metallurgy .

ysxb.csu.edu.cn

ysxb.csu.edu.cn

Abstract: The kinetics on vacuum refining process of metallurgical grade silicon was studied using maximum evaporation rate, critical pressure and mean free path of phosphorus in the metallurgical grade silicon at different temperatures. The behaviors of impurity phosphorus in the vacuum distillation process were examined in detail.