Recovery of Silicon and Silicon Carbide Powder from Waste Silicon Wafer Sludge

In an environmental and economic point of view, recycling of silicon wafer sludge is important. The aim of this work is to investigate the recycling method of silicon wafer sludge. Therefore, drying rate of silicon wafer sludge has been studied for separation of liquid and solid from sludge. Silicon and silicon carbide powder obtained from silicon wafer sludge were analyzed by SEM, XFR, XRD and particle size analyzer. The recovered oil was also characterized using GC-MS. From this work, it can be seen that the falling drying rate of silicon wafer sludge is linear equation. Various metal components have been found in recovered solid powder caused by wire sawing processing.

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Fabrication of silicon carbide nanoceramics

Journal of Materials Research ◽

10.1557/jmr.1996.0200 ◽

1996 ◽

Vol 11 (7) ◽

pp. 1601-1604 ◽

Cited By ~ 80

Author(s):

Mamoru Mitomo ◽

Young-Wook Kim ◽

Hideki Hirotsuru

Keyword(s):

Silicon Carbide ◽

Particle Size ◽

Deformation Behavior ◽

Superplastic Deformation ◽

Average Particle Size ◽

Liquid Phase Sintering ◽

Carbide Powder ◽

Average Particle ◽

Average Grain Size ◽

Silicon Carbide Powder

Ultrafine silicon carbide powder with an average particle size of 90 nm was densified by hot-processing with the addition of Al2O3, Y2O3, and CaO at 1750 °C. Silicon carbide nanoceramics with an average grain size of 110 nm were prepared by liquid phase sintering at low temperature. The materials showed superplastic deformation at a strain rate of 5.0 × 10-4/s at 1700 °C, which is the lowest temperature published. The microstructure and deformation behavior of materials from a submicrometer powder were also investigated as a reference.

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A Study on the Synthesis of SiC Powder from the Silicon Sludge of the Photovoltaic Industry

Materials Science Forum ◽

10.4028/www.scientific.net/msf.724.49 ◽

2012 ◽

Vol 724 ◽

pp. 49-52 ◽

Cited By ~ 6

Author(s):

Woo Teck Kwon ◽

Soo Ryong Kim ◽

Y. Kim ◽

Yoon Joo Lee ◽

Eun Jin Jung ◽

...

Keyword(s):

Particle Size ◽

Solar Cell ◽

Silicon Powder ◽

Point Of View ◽

Economic Point ◽

Heat Treated ◽

Particle Size Analyzer ◽

Different Temperatures ◽

Ft Ir ◽

Ft Ir Spectroscopy

β-SiC powder was synthesized directly from silicon sludge with carbon black. Large amount of silicon sludge is generated from Solar Cell industry. In an environmental and economic point of view, recycling silicon sludge is important. In this study, two kinds of silicon sludge were characterized using XRD, SEM/EDS and FT-IR. SiC powder was synthesized by the reaction of ball-milled silicon powder for 3h in vacuum at different temperatures (1350 and 1600). Physical properties of the heat treated SiC have been characterized using a SEM, XRD, Particle size analyzer and FT-IR Spectroscopy.

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The preparation of boron-doped silicon carbide powder by the carbothermal reduction of oxides derived from the hydrolyzed methyltriethoxysilane

Journal of Non-Crystalline Solids ◽

10.1016/0022-3093(88)90080-4 ◽

1988 ◽

Vol 100 (1-3) ◽

pp. 542-546 ◽

Cited By ~ 9

Author(s):

Yoshiyuki Sugahara ◽

Yasuharu Takeda ◽

Kazuyuki Kuroda ◽

Chuzo Kato

Keyword(s):

Silicon Carbide ◽

Carbothermal Reduction ◽

Carbide Powder ◽

Boron Doped ◽

Doped Silicon ◽

Reduction Of Oxides ◽

Silicon Carbide Powder

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Effects of the technological parameters on the characteristics of the polyacrylamide-coated silicon carbide powder

Materials Letters ◽

10.1016/s0167-577x(03)00292-1 ◽

2003 ◽

Vol 57 (26-27) ◽

pp. 4212-4217 ◽

Cited By ~ 2

Author(s):

Guangjun Zhang ◽

Mingkun Wei ◽

Qide Wu

Keyword(s):

Silicon Carbide ◽

Carbide Powder ◽

Technological Parameters ◽

Silicon Carbide Powder

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Experimental and numerical analysis on the thermal degradation of reinforced silicone-based composites: Effect of carbon fibres and silicon carbide powder contents

Thermochimica Acta ◽

10.1016/j.tca.2020.178563 ◽

2020 ◽

Vol 686 ◽

pp. 178563 ◽

Cited By ~ 1

Author(s):

G. Dugast ◽

A. Settar ◽

K. Chetehouna ◽

N. Gascoin ◽

J.-L. Marceau ◽

...

Keyword(s):

Silicon Carbide ◽

Numerical Analysis ◽

Thermal Degradation ◽

Carbide Powder ◽

Carbon Fibres ◽

Silicon Carbide Powder

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Flame Synthesis Of High Purity, Nanosized Crystalline Silicon Carbide Powder

MRS Proceedings ◽

10.1557/proc-410-167 ◽

1995 ◽

Vol 410 ◽

Cited By ~ 5

Author(s):

D. G. Keil ◽

H. F. Calcote ◽

R. J Gill

Keyword(s):

Silicon Carbide ◽

Crystalline Silicon ◽

Flame Synthesis ◽

Carbide Powder ◽

Air Exposure ◽

Precise Control ◽

Metal Impurities ◽

High Yields ◽

Silicon Carbide Powder

ABSTRACTSelf-propagating flames in pure silane-acetylene mixtures produce silicon carbide (SiC) powder and hydrogen as main products. Through precise control of the stoichiometry of the reactant gas mixture, it has been possible to produce white SiC at high yields. Characterization of such powders by TEM has shown that the nascent powder consists of polycrystalline hexagonal plates with a narrow size distribution (40 ± 7 nm diameter). Infrared spectroscopy of powders indicate microcrystalline SiC and little bound hydrogen. Chemical analysis by the ANSI method showed the powder to be >96 wt % SiC with an impurity of silica (3.9 weight %) due to air exposure of the powder. Traces (0.1 to 0.2 weight %) of both free carbon and free silicon were found. Metal impurities detected by SIMS were typically low: less than 10 ppba for aluminum, sodium, titanium and vanadium. Boron was observed at 10 ppma. Like the oxygen, the boron impurities are probably associated with exposure of the powders to the atmosphere.

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