The performance indicators comply with the solar energy special grade and above wash free standard (GB/T25074-2017). The depth of surface particle indentation is ≤ 5mm (the surface appears slightly rough, but there are no visible holes), the cross-sectional structure is dense, and there are no color spots, discoloration, visible pollutants, or oxidation. After cleaning, the silicon material reaches a finished polycrystalline silicon material without pollution, impurities, or oxidation, meeting the needs of customers for direct furnace use.
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