Effects of Technical Conditions on Structure, Morphology and Crystalline Size of Nanocrystalline Nd-Doped Ceria Powders


Gao Yong , Wang Lingling , Liu Huangqing ( Department of Applied Physics, Hunan University, Changsha 410082, China; College of Materials Science and Engineering, Hunan University, Changsha 410082, China)


<正> Nanocrystalline solid solution CeO2-Nd2O3 powders were prepared by low temperature combustion process. Special attention was paid to the influence of the glycine/metal ratio and calcination temperature on the powders phase structure, morphology and particle size. TG-DSC curves and XRD peaks of different glycine/metal ratio show that smaller particle size can be obtained with a slightly fuel-deficient ratio. XRD results indicate that the as-prepared powders are crystallized in a single fluorite structure. The crystalline size ranges from 9 to 24 nm, which increases with the increase of calcination temperature. The lower SEM images were characterized by the spongy and form-like microstruc-ture of the powders. Organic agent may be gradually eliminated by high temperature calcination process.


low temperature combustion; Nd-doped ceria; glycine/metal ratio; calcination temperature


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Total: 11 articles

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