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Abrasives and Cutting Instruments: SiC’s hardness and longevity make it a great abrasive material, broadly used in grinding wheels, sandpapers, and reducing tools.纯的碳化硅是无色的,工业用碳化硅由于含有铁等杂质而呈现棕色至黑色。晶体上彩虹般的光泽则是因为其表面产生的二氧化硅钝化层所致