20-22 May 2015
Asia/Bangkok timezone
The Centennial Celebration of General Relativity Theory and 80 Years of Thai Physics Graduate

Characterization of Ce${}_{1-x}$Pr${}_x$O${}_2$ was Synthesized by a Co-precipitate Method.

21 May 2015, 13:00
3h 30m
Board: MNA-08
Poster presentation Material Physics, Nanoscale Physics and Nanotechnology Poster-3

Speaker

Mr Pilan Ngiewlay (Department of Material Science and Nanotechnology, Faculty of Science, Khon Kaen University, Khon Kaen, THAILAND 40002)

Description

Ce${}_{1-x}$Pr${}_x$O${}_2$ ($x$ = 0, 5, 10, 15 and 20) was synthesized by a co-precipitate method. The crystallization temperature started around 300 ${}^{\circ}$C. After calcination at 800 ${}^{\circ}$C for 8 hr, the grains size of undoped sample was about 69 nm. Doping Pr into CeO${}_2$ resulted-in the reduction to grains size. The smallest grains size of 40 nm was observed for Ce${}_{0.8}$Pr${}_{0.2}$O${}_2$. Incorporation of Pr into ceria lattice was confirmed from the increased in lattice parameter and oxygen vacancy. Moreover the area intensity ratio of ceria main peak over the vacancy peak was reduced with the increasing dopant. Ce${}_{0.8}$Pr${}_{0.2}$O${}_2$ have the highest conductivity of 0.01 S/cm above 600 $^{\circ}$C.

Primary author

Mr Pilan Ngiewlay (Department of Material Science and Nanotechnology, Faculty of Science, Khon Kaen University, Khon Kaen, THAILAND 40002)

Co-author

Dr Apishok Tangtrakarn (Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen, THAILAND 40002)

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