Synthesis of Nanocrystalline Ce0.8Sm0.2O1.9 by Citrate Gel Method
A citrate gel method was applied to synthesize Ce0.8Sm0.2O1.9 powders by using cerium and samarium nitrates as raw materials and citric acid as complexing agent. It was shown that Ce0.8Sm0.2O1.9 phase was formed when the decomposition of the dried gel completed at 500 °C. The crystallite size of the synthesized powders calcined at 500 °C for 2 h is 5-10 nm. The powders can be easily sintered in air to yield over 97 % relative density at 1250 °C, which is significantly lower than sintering temperature of over 1500°C required by the doped ceria powders prepared via conventional ceramic techniques.
Wei Pan and Jianghong Gong
X. F. Guan et al., "Synthesis of Nanocrystalline Ce0.8Sm0.2O1.9 by Citrate Gel Method", Key Engineering Materials, Vols. 368-372, pp. 247-249, 2008