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	Synthesis of nanocrystalline Ce/sub 0.8/Sm/sub 0.2/O/sub 1.9/ by citrate gel method
	Xiangfeng Guan ; Yanan Wang ; Heping Zhou ; Lihua Zhou
	2010-05-10 ; 2010-05-10
关键词	Experimental/ calcination ceramics cerium compounds crystallites gels nanoparticles pyrolysis sintering/ nanocrystalline powders citrate gel method cerium nitrates samarium nitrates citric acid decomposition dried gel crystallite size calcination relative density sintering doped ceria powders conventional ceramic method temperature 500 degC time 2 h temperature 1250 degC Ce/sub 0.8/Sm/sub 0.2/O/sub 1.9// A8116 Methods of nanofabrication and processing A8120L Preparation of ceramics and refractories A8120E Powder techniques, compaction and sintering A6146 Structure of solid clusters, nanoparticles, nanotubes and nanostructured materials A8270G Gels and sols A8140G Other heat and thermomechanical treatments A8230L Decomposition reactions (pyrolysis, dissociation, and group ejection) A6480G Microstructure/ temperature 7.7315E+02 K time 7.2E+03 s temperature 1.52315E+03 K/ Ce0.8Sm0.2O1.9/ss Ce0.8/ss Sm0.2/ss O1.9/ss Ce/ss Sm/ss O/ss
中文摘要	A citrate gel method was applied to synthesize Ce/sub 0.8/Sm/sub 0.2/O/sub 1.9/ powders by using cerium and samarium nitrates as raw materials and citric acid as complexing agent. It was shown that Ce/sub 0.8/Sm/sub 0.2/O/sub 1.9/ phase was formed when the decomposition of the dried gel completed at 500 degrees C. The crystallite size of the synthesized powders calcined at 500 CC for 2 h is 5-10 nm. The powders can be easily sintered in air to yield over 97% relative density at 1250 degrees C, which is significantly lower than sintering temperature of over 1500 degrees C required by the doped ceria powders prepared via conventional ceramic techniques.
语种	英语 ; 英语
出版者	Trans Tech Publications Ltd. ; Switzerland
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/21942]
专题	清华大学
推荐引用方式 GB/T 7714	Xiangfeng Guan,Yanan Wang,Heping Zhou,et al. Synthesis of nanocrystalline Ce/sub 0.8/Sm/sub 0.2/O/sub 1.9/ by citrate gel method[J],2010, 2010.
APA	Xiangfeng Guan,Yanan Wang,Heping Zhou,&Lihua Zhou.(2010).Synthesis of nanocrystalline Ce/sub 0.8/Sm/sub 0.2/O/sub 1.9/ by citrate gel method..
MLA	Xiangfeng Guan,et al."Synthesis of nanocrystalline Ce/sub 0.8/Sm/sub 0.2/O/sub 1.9/ by citrate gel method".(2010).

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