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In this paper, superfine SiO 2  nanoparticles are utilized as composite abrasive additive to improve the polishing property of CeO 2,  which is prepared through chemical precipitation method by rare-earth chloride as raw materials, silicofluoric acid as fluoride, Na 2 CO 3  as modifier, and NH 4 HCO 3  as precipitator. XRD, SEM, particle size analyzer, and atomic force microscopy are applied to characterize the physical structure, morphology, and size distribution. Furthermore, the as-prepared composite abrasive is used to perform chemical mechanical polishing (CMP) experiment on K9 glass to identify the impact of different mass fraction of SiO 2  on the CMP property of work materials. The results show that the composite abrasive contained 0.5% SiO 2  has the best polishing property, the surface roughness, and material removal rate of glass after polishing can reach at 1.3157 nm and 22.6 nm/min, respectively.

Experimental study on polishing performance of CeO2 and nano-SiO2 mixed abrasive