Hostname: page-component-cd9895bd7-q99xh Total loading time: 0 Render date: 2024-12-29T12:36:33.907Z Has data issue: false hasContentIssue false
  • English
  • Français

Oxygen Potential of (Th0.7Ce0.3)O2-x

Published online by Cambridge University Press:  31 January 2011

Masahiko Osaka ,
Kosuke Tanaka ,
Shuhei Miwa ,
Ken Kurosaki ,
Masayoshi Uno  and
Shinsuke Yamanaka
Masahiko Osaka
Affiliation:
ohsaka.masahiko@jaea.go.jp
Kosuke Tanaka
Affiliation:
tanaka.kosuke@jaea.go.jp, Japan Atomic Energy Agency, Oarai Research and Development Center, Fuels and Materials Department, Alpha Gamma Section, 4002 Narita-cho, Oarai-machi, Ibaraki-ken, 311-1393, Japan, 81.29.267.4141, 81.29.266.0016
Shuhei Miwa
Affiliation:
miwa.shuhei@jaea.go.jp, Japan Atomic Energy Agency, 4002 Narita-cho, Oarai-machi, Higashi-Ibaraki-gun, Ibaraki, 311-1393, Japan
Ken Kurosaki
Affiliation:
kurosaki@see.eng.osaka-u.ac.jp, Osaka University, 2-1 Yamadaoka, Suita, 565-0871, Japan
Masayoshi Uno
Affiliation:
uno@u-fukui.ac.jp, University of Fukui, Fukui, Japan
Shinsuke Yamanaka
Affiliation:
yamanaka@see.eng.osaka-u.ac.jp, United States
Get access

Abstract

Oxygen potentials of (Th0.7Ce0.3)O2-x were experimentally determined by means of thermogravimetric analysis as a function of non-stoichiometry at 1173 and 1273 K. Oxygen potentials of (Th0.7Ce0.3)O2-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 (Th0.7Ce0.3)O2-x were similar to those of CeOO2-x when they were plotted as a function of average Ce valence.

Keywords

thermogravimetric analysis (TGA)Ceactinide
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1215: Symposium V – Materials Research Needs to Advance Nuclear Energy , 2009 , 1215-V18-04
Copyright
Copyright © Materials Research Society 2010

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

[1] Osaka, M. Koi, M. Takano, S. Yamane, Y. and Misawa, T. J. Nucl. Sci. Technol. 43, 367 (2006).Google Scholar
[2] Hammou, A. Deportes, C. Robert, G. and Vitter, G. Mat. Res. Bull. 6, 823(1971).Google Scholar
[3] Keller, C. Berndt, U. Engerer, H. and Leitner, L. J. Solid State Chem. 4, 453(1972).Google Scholar
[4] Osaka, M. J. Alloys Compd. 475, L31(2009).Google Scholar
[5] Lindemer, T. B. CALPHAD 10, 129(1986).Google Scholar
[6] Woodley, R. E. J. Nucl. Mater. 96, 5(1981).Google Scholar
[7] Sorensen, O. T. Thermodynamics and defect structure of nonstoichiometric oxides, in: Nonstoichiometric Oxides, edited by Sorensen, O. T. (Academic Press Inc., New York, 1981), pp. 1–59.Google Scholar