| Preparation and Characterization of Nanocrystalline CeO2 by Precipitation Method |
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| 作者姓名： | 董相廷 李明 张伟 刘桂霞 洪广言 |
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| 作者单位： | [1]FacultyofAppliedSciences,ChangchunInstituteofOpticsandFineMechanics,Changchun130022,China [2]ChangchunInstituteofAppliedChemistry,ChineseAcademyofSciences,Changchun130022,China |
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| 基金项目： | theYouthFoundationofSciencesofChangchunInstituteofOpticsandFineMechanics(YJ95 0 3 1) |
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| 摘 要： | CeO2 nanocrystalline particulates with different sizes were prepared by precipitation method using ethanol as dispersive and protective reagent. XRD spectra show that the synthesized CeO2 has cubic crystalline structure of space group OH^H-FM3M, when calcination temperature is in the range of 250 - 800 ℃. TEM images reveal that CeO2 particles are spherical in shape. The average size of the particles increases with the increase of calcination temperature. Thermogravimetric analysis indicates that the weight loss of precursor mainly depends on the calcination temperature, and little depends on the calcination time. Measurements of CeO2 relative density show that the relative density of CeO2 nanocrystalline powders increases with increasing CeO2 particle size.
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| 关 键 词： | CeO2 二氧化铈 稀土 纳米晶 制备 析出 XRD |
Preparation and Characterization of Nanocrystalline CeO2 by Precipitation Method |
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| Dong Xiangting,Li Ming,Zhang Wei,Liu Guixia,Hong Guangyan.Preparation and Characterization of Nanocrystalline CeO2 by Precipitation Method[J].Journal of Rare Earths,2002,20(6):583-586. |
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| Authors: | Dong Xiangting Li Ming Zhang Wei Liu Guixia Hong Guangyan |
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| Abstract: | CeO2 nanocrystalline particulates with different sizes were prepared by precipitation method using ethanol as dispersive and protective reagent. XRD spectra show that the synthesized CeO2 has cubic crystalline structure of space group O5H-FM3M, when calcination temperature is in the range of 250～800 ℃. TEM images reveal that CeO2 particles are spherical in shape. The average size of the particles increases with the increase of calcination temperature. Thermogravimetric analysis indicates that the weight loss of precursor mainly depends on the calcination temperature, and little depends on the calcination time. Measurements of CeO2 relative density show that the relative density of CeO2 nanocrystalline powders increases with increasing CeO2 particle size. |
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| Keywords: | rare earths cerium oxide nanoparticulate precipitation method |
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