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通过采用碳酸镧(铈、镨)为前驱体,经氟化、高温焙烧、机械湿磨的方法得到稀土抛光粉,研究了不同掺镨量对稀土抛光粉的物相结构、表面形貌、粒度、密度、抛蚀量的影响。通过XRD分析得出结论:La2O3,Pr6O11固溶于CeO2的晶格结构中,并且出现了新的物相LaOF;随镨掺量的增大,LaOF的衍射峰强度不断增加,晶化程度不断增加;CeO2的XRD特征峰向左偏移,晶胞参数变大,晶面间距变大。通过粒度分析得出结论:随镨掺量的增加,抛光粉的中位粒径出现了先减小后增大的规律性变化。通过抛蚀量测试得出结论:随镨掺量的增加,抛光粉的抛蚀量出现了先增大后减小的变化。掺镨稀土抛光在镨含量为4.8%时,具有最小的中位粒径、较好的表面形貌和最大的抛蚀量。
By using lanthanum carbonate (cerium and praseodymium) as precursors, rare earth polishing powders were obtained by fluorination, high temperature calcination and mechanical wet milling. The effects of different concentrations of praseodymium on the phase structure, surface morphology, particle size , Density, erosion impact. The results of XRD indicate that La2O3 and Pr6O11 are dissolved in the lattice structure of CeO2 and a new phase LaOF is formed. With the increase of the content of praseodymium, the intensity of the diffraction peaks of LaOF increases and the degree of crystallization increases The XRD characteristic peak of CeO2 shifts to the left, the unit cell parameters become larger and the interplanar spacing becomes larger. Through the particle size analysis, the conclusion is drawn that with the increase of the content of praseodymium, the regular change of the median diameter of the polishing powder decreases firstly and then increases. Through the test of the amount of erosion, it is concluded that the amount of polishing powder increases first and then decreases with the increase of the amount of praseodymium. Praseodymium rare earth polishing praseodymium content of 4.8%, with the smallest median particle size, good surface morphology and the largest amount of erosion.