Evolution and present status of silicon carbide slurry recovery in silicon wire sawing

Murthy, Hyma

doi:10.1016/j.resconrec.2015.08.009

Cited by 32 publications

(5 citation statements)

References 12 publications

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“…Mc-Si solar cells, as one of the main products for solar photovoltaic applications, have a substrate of mc-Si wafers that can be obtained by processing by wire saw [3]. Earlier, the processing method for silicon ingot cutting was mainly slurry wire saw (SWS) [4,5]. The surface morphology of the mc-Si wafer obtained by this process shows that pits are uniformly distributed on the wafer surface, which facilitates subsequent etching using wet acid etching process [6,7].…”

Section: Introductionmentioning

confidence: 99%

Surface properties of diamond wire sawn photovoltaic mc-Si wafers by stirred slurry pretreated and additive-free acid textured

Liu¹,

Gao²,

Yang³

2022

Surf. Topogr.: Metrol. Prop.

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Diamond wire saw cutting multi-crystalline silicon (mc-Si) wafers has the advantage of high cutting rate. However, it is difficult to follow the current additive-free wet acid etching process to prepare the anti-reflective textured surface due to the obvious saw marks on the surface of the as-sawn wafer. In response to this problem, this paper proposes a turbine-type stirred slurry pretreatment process to modify the surface of mc-Si wafers cut by diamond wire to make it suitable for the subsequent conventional wet acid texturing process. The experimental results show that the consistency of the surface structure of the mc-Si wafers can be effectively improved after turbine-type stirred slurry pretreatment by choosing suitable process parameters. The reflectivity of the pretreated mc-Si wafers after acid texturing is greatly reduced compared with that before processing, which can meet the production requirements of solar photovoltaic cells. Furthermore, based on ANSYS Workbench and Fluent, numerical simulation of the surface pretreatment process of large-size silicon wafers in practical industrial applications was carried out, and the uniformity of the surface modification treatment was analyzed.The research results provide ideas for promoting the adaptation of the diamond wire sawing of mc-Si silicon wafers to the acid wet texturing technology.

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Section: Introductionmentioning

confidence: 99%

Surface properties of diamond wire sawn photovoltaic mc-Si wafers by stirred slurry pretreated and additive-free acid textured

Liu¹,

Gao²,

Yang³

2022

Surf. Topogr.: Metrol. Prop.

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“…Particles Si, SiC and Fe form a stable suspension in PEG, and the Si/SiC powder particles possess overlapping size ranges and similar physicochemical properties. This makes it difficult to separate and recycle Si and SiC powders from SSW . A promising approach is to recycle Si and SiC powders together and use them to prepare high-added-value materials such as SiC whiskers.…”

Section: Introductionmentioning

confidence: 99%

“…This makes it difficult to separate and recycle Si and SiC powders from SSW. 18 A promising approach is to recycle Si and SiC powders together and use them to prepare high-added-value materials such as SiC whiskers. However, there are no existing reports on the preparation of SiC whiskers using SSW as the silicon source.…”

Section: ■ Introductionmentioning

confidence: 99%

Growth of SiC Whiskers onto Carbonizing Coir Fibers by Using Silicon Slurry Waste

Cao

Xiang

et al. 2017

ACS Sustainable Chem. Eng.

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To reduce environmental pollution and waste of resources, it is very important to recycle valuable materials in silicon slurry waste (SSW). We report a novel method for the rapid preparation of SiC nanowhiskers by spark plasma (SP) assisted thermal treatment using SSW as the silicon source. In the preparation process, coir fibers were used as the carbon source and whisker growth substrate. At 1100–1300 °C, carbon-rich tadpole-like 3C–SiC whiskers with Fe catalyst caps were prepared by the vapor–liquid–solid growth mechanism. At 1400–1600 °C, carbon-rich, stick-like 3C–SiC whiskers without Fe catalyst caps with aspect ratios of about 40, and diameters of about 50 nm were prepared by the vapor–solid growth mechanism. The SiC whiskers grew along the [111] direction on the (111) plane at different temperatures. At the optimum temperature of 1500 °C, the silicon in SSW reacted completely, and SiC whiskers with good morphology were prepared. Furthermore, the photoluminescence (PL) spectra of SiC whiskers showed strong blue-violet emission at 450 nm. Accordingly, this study provides an environmentally friendly method for preparing SiC whiskers.

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“…PEG is collected by dehydrating or distilling the liquid after solid-liquid separation of cutting slurry. Afterwards, the solid is dissolved in acid to remove iron and Si, SiC fine powder is left behind [3][4][5][6][7]. The recovery of crystalline Si is still a challenge.…”

Section: Introductionmentioning

confidence: 99%

The Preparation of Color Glasses Using the Solid Waste Generated in Crystalline Silicon Cutting Process

Liu¹,

Liu²

2017

Proceedings of the 2nd 2016 International Conference on Sustainable Development (ICSD 2016)

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Abstract-Solid waste generated in crystalline silicon cutting process (referred to as the silicon waste) was used to prepared color glasses. Silicon carbide and silicon in the silicon waste acted as silicon source and iron fragments as coloring agent. All components in the waste were fully used by vitrification of the solid waste with addition of Na2CO3, CaO, etc. The highest content of the silicon waste was 44.97% in the glass batch. The prepared color glasses can absorb part of visible light and ultraviolet light.

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Evolution and present status of silicon carbide slurry recovery in silicon wire sawing

Cited by 32 publications

References 12 publications

Surface properties of diamond wire sawn photovoltaic mc-Si wafers by stirred slurry pretreated and additive-free acid textured

Surface properties of diamond wire sawn photovoltaic mc-Si wafers by stirred slurry pretreated and additive-free acid textured

Growth of SiC Whiskers onto Carbonizing Coir Fibers by Using Silicon Slurry Waste

The Preparation of Color Glasses Using the Solid Waste Generated in Crystalline Silicon Cutting Process

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