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以高浓度稀土料液为原料,高温下制备的稀土碳酸盐为高密度碱式碳酸稀土,然后以高密度碳酸稀土为原料,采用高温爆裂法制备超细稀土抛光粉。通过SEM、粒度测定、抛光测定对样品进行表征。研究了不同的煅烧模式、爆裂温度、老化时间和老化温度对稀土氧化物形貌、粒度和性能的影响。结果表明:高密度碱式碳酸稀土在900℃~950℃高温爆裂、900℃~1000℃老化3 h~4 h,得到粒径D50为290 nm左右,分散性、抛光效果较好的超细稀土抛光粉,并可实现超细稀土抛光粉工业化生产。
Using high concentration rare earth material as raw material, the rare earth carbonate prepared at high temperature is high density basic rare earth carbonate, and then high density rare earth carbonate is used as raw material to prepare superfine rare earth polishing powder by high temperature burst method. The samples were characterized by SEM, particle size determination, polishing assay. The effects of different calcination modes, burst temperature, aging time and aging temperature on morphology, particle size and properties of rare earth oxides were investigated. The results show that the high density rare earth carbonate ruptures at high temperature from 900 ℃ to 950 ℃, and ages from 900 ℃ to 1000 ℃ for 3 h to 4 h. The D50 is about 290 nm, and the fine dispersion and polishing effect is good Polishing powder, and can achieve ultra-fine rare earth polishing powder industrial production.