Synthesis and Characterization of SmxGdyCe1-x-yO2-δ Nanopowders

材料科学技术（英文）, 2005, 21(1): 131-134.

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1.School of Materials Science and Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, China;School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China

2.School of Materials Science and Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, China

3.School of Materials Science and Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, China

4.School of Materials Science and Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, China

5.School of Materials Science and Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, China

6.School of Materials Science and Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, China;School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China

基金项目: the Natural Science Foundation of Inner Mongolia under(20010808)

Synthesis and Characterization of SmxGdyCe1-x-yO2-δ Nanopowders

Keywords： Coprecipitation

SmxGdyCe1-x-yO2-δ (x+y=0.2 and x=0, 0.04, 0.08, 0.12, 0.16, 0.2) nanopowders were prepared by a coprecipitation method. The zeta potential and sedimentation volume of Ce(OH)4 aqueous dispersions at different pH values were measured. The isoelectric point (IEP) of Ce(OH)4 suspensions is 7.0. The maximum potential value of -18.5 mV and maximum sedimentation volume of 19 ml are reached at pH=10. The evolution behaviors of and XRD. The powders decompose to ceria based solid solution at a temperature below 300℃ and forms cubic fluorite structure ceria at about 650℃. The properties of SmxGdyCe1-x-yO2-δ solid solutions were characterized by XRD, TEM and BET. The lattice parameter of doped CeO2 increases linearly with increasing Sm3+ substitution (or decreasing Gd3+ substitution). The particle size of the doped ceria powders is from 5 nm to 10 nm.

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Synthesis and Characterization of SmxGdyCe1-x-yO2-δ Nanopowders

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