Silicon Recovery from Kerf Slurry Waste: a Review of Current Status and Perspective

Hachichi, K.; Lami, Andrea; Zemmouri, Hassiba; Cuellar, Patricia; Soni, Richa; Aït-Amar, H.; Drouiche, Nadjib

doi:10.1007/s12633-017-9642-x

Cited by 34 publications

(19 citation statements)

References 30 publications

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“…With the rapid development of the worldwide photovoltaic industry, the demand for crystalline silicon wafers is on the rise. 1 Silicon wafers are produced from crystalline silicon ingots by multi-wire slicing methods. There are basically two methods for silicon ingots slicing.…”

Section: Introductionmentioning

confidence: 99%

Study on the synthesis of β-SiC nanoparticles from diamond-wire silicon cutting waste

et al. 2019

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Section: Introductionmentioning

confidence: 99%

Study on the synthesis of β-SiC nanoparticles from diamond-wire silicon cutting waste

et al. 2019

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“…However, it is difficult to dispose the Si sludge by simple storage in landfills or by incineration because of the cutting oil used for ingot cutting [13]. Various studies for recycling Si sludge have been conducted with the development of methods, such as the recovery of high-purity silicon through secondary processing or SiC production; however, the use of the current recycling methods is still limited [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Thermal properties of porous ceramics manufactured by direct foaming using silicon sludge and silica fume

Son

Kang

Kim

2021

Journal of Asian Ceramic Societies

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In this study, waste silica fume was used as the raw material for manufacturing porous ceramics, and its mechanical and thermal properties required for application as thermal insulators were studied. For pore formation with direct foaming, Si sludge (0.01, 0.05, and 0.1 wt%) and NaOH aqueous solution (14 N) were used as the foaming agents. The porous ceramics sintered at 900°C showed an apparent porosity of 85.9-89.8%, and the specimen with 0.1 wt% Si sludge showed the highest apparent porosity of 89.8% and a bulk density of 0.24 g/cm 3 . Scanning electron microscopy results showed that with increasing Si sludge substitution, an open pore structure was formed because of the increase in the pore size from several tens to several hundreds of micrometers. The compressive strength decreased from 3.82 to 2.11 MPa as the amount of added Si sludge increased from 0.01 to 0.1%, respectively. The thermal conductivity was less than 1.0 W•m −1 •K −1 in the temperature range of 25-800°C, and the specimen with 0.1 wt% Si sludge showed a low thermal conductivity of 0.2-0.6 W•m −1 •K −1 . The thermal expansion coefficients were 17.1-22.4 × 10 −6 /K in the temperature range of 25-800°C.

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“…On the other hand, the silicon sludge discharged from the silicon ingot cutting process can be used as a silicon source in this reaction. Currently, in the semiconductor and photovoltaic industries, a high-purity silicon ingot is being sliced for manufacturing Si wafers, and more than 40% of the ingot is lost to sludge in the cutting process [19][20][21]. The discharged silicon sludge is expected to be increasing worldwide, owing to the development of electronic devices and the growth of the photovoltaic industry.…”

Section: Introductionmentioning

confidence: 99%

“…Hence, the sludge generated in this process does not contain SiC but contains only oil, water, Si, and iron particles. So, if oil or water are removed, highly pure Si powder can be easily recovered by diverse methods such as by centrifugation and specific gravity separation [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Silicon Carbide from Recycled Silicon Wafer Cutting Sludge and Its Purification

2018

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Around the world, silicon carbide (SiC) is used as a raw material in several engineering applications because of its various beneficial properties. Currently, though the Acheson method is one of the most emblematic to manufacture SiC, the direct carbonization of metallic silicon is simple and beneficial. In this reaction, silicon wafer cutting sludge can be used as an alternative silicon source material. The silicon wafer sludge contains silicon, ethylene glycol, cooling water, and a small amount of impurities. In this study, SiC was synthesized using silicon wafer sludge by a carbothermal process. In a typical experiment, the silicon sludge was mixed with carbon at different molar ratios. Then, the mixture was turned into pellets, which were placed in alumina crucibles and heat-treated at a temperature from 1400 °C to 1600 °C to fabricate SiC. To deduce the optimum condition for the synthesis of SiC, an investigation was carried out on the effects of different mixing ratios, temperatures, and heating times. To ensure sufficient carbonization, excess carbon was mixed, and the synthesized SiC was characterized by X-ray diffraction (XRD). Subsequently, purification of the synthesized SiC products by oxidation of excess carbon was performed. The removal of extra carbon could be confirmed by XRD and attenuated total reflectance (ATR) spectroscopy. This process can give basic information for the development of a technology to produce SiC using recycling Si wafer cutting sludge waste.

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Silicon Recovery from Kerf Slurry Waste: a Review of Current Status and Perspective

Cited by 34 publications

References 30 publications

Study on the synthesis of β-SiC nanoparticles from diamond-wire silicon cutting waste

Study on the synthesis of β-SiC nanoparticles from diamond-wire silicon cutting waste

Thermal properties of porous ceramics manufactured by direct foaming using silicon sludge and silica fume

Fabrication of Silicon Carbide from Recycled Silicon Wafer Cutting Sludge and Its Purification

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