EFFECT OF DIFFERENT NANOSTRUCTURE ON PROPERTIES OF SAMARIUN DOPED CERIUM DIOXIDE
In the present study, the Samarium-doped ceria (SDC) was synthesized in two different nanostructures; round shape nanocrystallites and nanorods. Nanocrystallites of average size 40-60 nm range was synthesized by glycinenitrate combustion routes and nanorod of diameter 50-70 nm range was obtained by soft chemical routes. Structures were characterized by X-RD, SEM, and TEM. Densification behaviors of both the nanostructures were studied. Densification rate of Nanorod like structure was observed to be more than nanocrystallite structureat the initial stage of sintering (up to 1000℃), but it was slowed down above 10500 and relative density reached to almost constant value. It was found that relative density of 91% was obtained for nanorods at 11000C for 5 h heating, with further increase in temperature; density was examined to be almost constant. For nanocrystallites, gas tight relative density (95%) was attained at 1250℃ for 5 h heating. The electrical conductivity was measured by using impedance spectroscopy. The Impedance plot exhibits large grain boundary arc for nanorods compare to nanocrystallites. The total conductivity of nanorods is found to be 1.9×10-2 S/cm and that of nanocrystallite was 2.6×10-2 S/cm at 500℃.
Nanorods round-shape nanocrystallites samarium doped ceria
S. ACHARYA K. SINGH
Department of Physics, Rashtrasant Tukdoji Maharaj Nagpur University,Nagpur-440033, M.S. India SGB Amaravati University, Amaravati, M.S. India
国际会议
The 12th Asian Conference on Solid State Ionics(第十二届亚洲固态离子学会议暨第十五届中国固态离子学会议)
武汉
英文
288-295
2010-05-02（万方平台首次上网日期，不代表论文的发表时间）