Non-stoichiometries of (Nd0.1Ce0.9)O2−x and (Gd0.1Nd0.1Ce0.8)O2−x

Osaka, Masahiko

doi:10.1016/j.jallcom.2008.07.103

Cited by 3 publications

(4 citation statements)

References 13 publications

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“…Equilibrium for both p O2 and weight was attained within 1 h after each successive p O2 change. This has been clarified by the TGA of CeO 2Àx using the present apparatus [7]. As the relation between oxygen non-stoichiometry and p O2 for CeO 2Àx was well established [8], CeO 2Àx is frequently used as a standard material for experiments of oxygen non-stoichiometry.…”

Section: Methodsmentioning

confidence: 73%

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Oxygen non-stoichiometries in (Th0.7Ce0.3)O2−x

Osaka

Miwa

Kurosaki

et al. 2011

Journal of Nuclear Materials

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Section: Methodsmentioning

confidence: 73%

“…. The chemical formula can, therefore, The mean Ce valence can be calculated as above for (U 0 7. Ce 0.3 )O 2Àx as well.…”

mentioning

confidence: 99%

Oxygen non-stoichiometries in (Th0.7Ce0.3)O2−x

Osaka

Miwa

Kurosaki

et al. 2011

Journal of Nuclear Materials

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“…Oxygen partial pressures that give the stoichiometry at each temperature were defined as those at p O2 =10 -3 MPa [4], which was obtained by using dilute O 2 gas. The (Th 0.7 Ce 0.3 )O 2-x sample was loaded into an alumina pan and placed in the TGA apparatus.…”

Section: Methodsmentioning

confidence: 99%

Oxygen Potential of (Th_0.7Ce_0.3)O_2-x

et al. 2009

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Oxygen potentials of (Th 0.7 Ce 0.3 )O 2-x were experimentally determined by means of thermogravimetric analysis as a function of non-stoichiometry at 1173 and 1273 K. Oxygen potentials of (Th 0.7 Ce 0.3 )O 2-x at each temperature increased with increase of oxygen-to-metal (O/M) ratio (=2-x) and steep increases of the oxygen potentials when approaching O/M ratio = 2 were observed. These characteristics are typical for non-stoichiometric fluorite-type actinide dioxides. The oxygen potentials of (Th 0.7 Ce 0.3 )O 2-x were similar to those of CeO 2-x when they were plotted as a function of average Ce valence.

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“…A considerable amount of work has been done on the conductivity of RE doped ceria. The electrical conductivity of ceria has been extensively investigated with respect to different ions (Ca 2+ , Y 3+ , La 3+ , Gd 3+ , Sc 3+ , Sr 2+ , Sm 3+ ) [16][17][18] and substituent concentration [19][20][21][22][23]. An increase in the mol% of substituent rare earth tends to form a second phase due to the solubility limit and this reduces the conductivity [24].…”

Section: Introductionmentioning

confidence: 99%