摘要
以碳酸氢钠为沉淀剂,采用正序分段加料的方式制备氧化镨钕,研究了沉淀终点pH值、沉淀温度对氧化镨钕前驱体及产品氧化镨钕粒度、杂质含量的影响。结果表明,当沉淀终点pH值为5.10、沉淀温度50℃时,制备的氧化镨钕粉体中位粒度D_(50)为21.45μm,粒度分布窄,形貌为片状结晶团聚形成的类球形粉体,其中Cl^(-)含量为0.017%,Na_(2)O含量为0.012%,关键指标优于国家标准的要求。
With sodium bicarbonate as a precipitant, praseodymium neodymium oxide was prepared by feeding step by step in a positive sequence. The effects of pH value at the end of precipitation and precipitation temperature on particle size and impurity content of the precursor and product of praseodymium neodymium oxide were all investigated. The results show that precipitation at 50℃ with pH value of 5.10 at the end can prepare a praseodymium neodymium oxide powder with a median particle size D_(50) of 21.45 μm and narrow particle size distribution. It is sphere-like powder formed by flake crystallization agglomeration, with the content of Cl^(-)and Na_(2)O at 0.017% and 0.012%, respectively, indicating higher than the national standards.
作者
叶毅
李益民
曾纪术
周志伟
秦健春
李宽
潘务霞
江泽佐
何琦
YE Yi;LI Yimin;ZENG Jishu;ZHOU Zhiwei;QIN Jianchun;LI Kuan;PAN Wuxia;JIANG Zezuo;HE Qi(School of Mechanical and Automobile Engineering,Guangxi University of Science and Technology,Liuzhou 545616,Guangxi,China;Guangxi Guosheng Rare Earth New Materials Co Ltd,Chongzuo 532200,Guangxi,China)
出处
《矿冶工程》
CAS
北大核心
2023年第1期114-117,122,共5页
Mining and Metallurgical Engineering
基金
崇左市科技计划项目(崇科20220607)
柳州市科技计划项目(2020GBDA0601)。
关键词
氧化镨钕
温度
pH值
粒度
杂质
沉淀剂
碳酸氢钠
沉淀法
praseodymium neodymium oxide
temperature
pH value
grain size
impurity
precipitant
sodium bicarbonate
method of precipitation