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Defect chemistry and electrical properties of a Pr-CeO2 solid solution: From nano- to micro-scale

Published online by Cambridge University Press:  12 October 2011

S. R. Bishop ,
J-J. Kim ,
N. Thompson  and
H. L. Tuller
S. R. Bishop
Affiliation:
Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, U.S.A.
J-J. Kim
Affiliation:
Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, U.S.A.
N. Thompson
Affiliation:
Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, U.S.A.
H. L. Tuller
Affiliation:
Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, U.S.A.
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Abstract

In nano-crystalline ceramics, the grain boundary volume fraction is large relative to that in micro-crystalline materials and can therefore become the dominant factor in determining its electrical, chemical, and mechanical properties. Reduced enthalpies of defect formation for nanocrystalline Pr0.1Ce0.9O2-δ , derived from thermo-gravimetric and impedance spectroscopy measurements, are reported. In addition, observations of cerium carbonate formation on nanoporous materials and implications for thermo-gravimetric analysis are discussed.

Keywords

nanoscaleelectrical propertiesionic conductor
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1331: Symposium K – Frontiers of Solid-State Ionics , 2011 , mrss11-1331-k02-02
Copyright
Copyright © Materials Research Society 2011

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References

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