Identification of the Silica Nanoparticles Appeared in the Slurry Generated during the Sawing Step to Manufacture the Photovoltaic Cells
Source abstract
Abstract
The great growth of the photovoltaic panels industry generates an important amount of slurry during the sawing step, two techniques are used: metallic wire sawing and diamond wire sawing. The metallic wire sawing slurry can mainly contain particles of pure silicon up to 40% Wt, particles of silicon carbide (SiC) which are used as an abrasive element during sawing, metallic impurities based on iron (Fe) which come from the wire, polyethylene glycol (PEG) which is used as a lubricant. However, the sawing stage determines the cost of producing photovoltaic cells, so its recovery has become a necessity. For this purpose, we are interested to study the chemical behavior of the input elements involved in the composition of the slurry. For that, the pH of the slurry was measured for 7 days during its storage. Then, it was washed with acetone to dissolve the polyethylene glycol and separate the liquid phase from the solid one. Solid phase was dried at 70 °C to obtain a slurry powder. This powder has been characterized by ATR-FTIR spectroscopy, Raman spectroscopy and the X-ray diffractometer. The liquid phase has been characterized by ATR-FTIR, Raman and TGA analysis. The results confirm the chemical instability of the slurry and the appearance of nanoparticles that have been identified.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Photovoltaic Systems and Sustainability · Recycling and Waste Management Techniques · Extraction and Separation Processes
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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