含氟镧铈复合氧化物的制备、结构及性能研究

发布时间：2018-02-24 06:28

  本文关键词： 含F的La-Ce复合氧化物 制备 喷雾干燥 形貌 抛光性能　出处：《中国稀土学报》2017年01期 　论文类型：期刊论文

【摘要】：La,Ce是丰度最高的稀土元素,主要用于催化和抛光材料。研究了从稀土盐到含F的La-Ce复合氧化物的制备过程,以及La/Ce比例、氟化过程、干燥过程及焙烧温度等对制备的含氟镧铈复合氧化物结构、粒径和形貌的影响。结果表明,用Na F 90℃氟化2 h,经喷雾干燥,采用分段焙烧技术,最终经850℃焙烧后可制备出颗粒分布均匀、团聚少、呈椭球形的含F的La-Ce铈复合氧化物。制备的样品用于旭硝子玻璃的研磨抛光,测得切削率0.115 mm/20 min,样品合格率约为90%。
[Abstract]:LaCe is the most abundant rare earth element, which is mainly used for catalytic and polishing materials. The preparation process of La-Ce complex oxides from rare earth salts to F, La/Ce ratio and fluorination process were studied. The effects of drying process and calcination temperature on the structure, particle size and morphology of the prepared composite oxides of lanthanum and cerium fluoride were studied. Finally, after calcination at 850 鈩，

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