Preparation and Characterization of CeO2 Superfine Powder
来源期刊：JOURNAL OF RARE EARTHS2003年第6期
论文作者：刘铃声 熊晓柏 邱巨峰 胡艳宏 柳召刚 李梅
Key words：ceria; superfine powder; precipitation method; preparation; characterization; rare earths;
Abstract: The CeO2 superfine powder was prepared by the co-precipitation method, using the industrial grade Ce2(CO3)3 and NH4HCO3 as starting material and precipitating reagent, respectively. The precipitated precursons and the calcinated products were characterized by the thermogravimetric analysis/thermoanalysis (TGA/DTA), X-ray diffraction analysis (XRD) and transmission electron microscopy (TEM). The results show that using NH4HCO3 as a precipitating reagent, the precipitate decomposed full as it was heated to 360 ℃. The CeO2 superfine powder formed by calcinating the precipitate belongs to a cubic CaF2-type stru cture and has the first mean particle diameter 140 nm and second mean particle diameter 630 nm. The CeO2 powder particles aggregate and grow with raising the calcination temperature.
刘铃声1，熊晓柏1，邱巨峰1，胡艳宏1，柳召刚1，李梅2
(1.Baotou Research Institute of Rare Earths, Baotou 014010, China;
2.Department of Materials Engineering, Baotou College of Iron and Steel Technology, Baotou 014010, China)
Abstract:The CeO2 superfine powder was prepared by the co-precipitation method, using the industrial grade Ce2(CO3)3 and NH4HCO3 as starting material and precipitating reagent, respectively. The precipitated precursons and the calcinated products were characterized by the thermogravimetric analysis/thermoanalysis (TGA/DTA), X-ray diffraction analysis (XRD) and transmission electron microscopy (TEM). The results show that using NH4HCO3 as a precipitating reagent, the precipitate decomposed full as it was heated to 360 ℃. The CeO2 superfine powder formed by calcinating the precipitate belongs to a cubic CaF2-type stru cture and has the first mean particle diameter 140 nm and second mean particle diameter 630 nm. The CeO2 powder particles aggregate and grow with raising the calcination temperature.
Key words:ceria; superfine powder; precipitation method; preparation; characterization; rare earths;
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