Defect and transport properties of nanocrystalline CeO2-x

Y. M. Chiang; E. B. Lavik; I. Kosacki; H. L. Tuller; J. Y. Ying

doi:10.1063/1.117366

Defect and transport properties of nanocrystalline CeO_2-x

Y. M. Chiang^*, E. B. Lavik, I. Kosacki, H. L. Tuller, J. Y. Ying

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

371 Scopus citations

Abstract

It is shown that unique defect thermodynamics and transport properties result for oxides of a few nanometers crystallite size. Fully-dense CeO_2-x polycrystals of ∼10 nm grain size were synthesized, and their electrical properties compared with those of samples coarsened from the same material. The nanocrystals showed reduced grain boundary resistance, 104 higher electronic conductivity, and less than one-half the heat of reduction of its coarse-grained counterpart. These properties are attributed to a dominant role of interfacial defect formation.

Original language	English
Pages (from-to)	185-187
Number of pages	3
Journal	Applied Physics Letters
Volume	69
Issue number	2
DOIs	https://doi.org/10.1063/1.117366
State	Published - 8 Jul 1996
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.117366

Cite this

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abstract = "It is shown that unique defect thermodynamics and transport properties result for oxides of a few nanometers crystallite size. Fully-dense CeO2-x polycrystals of ∼10 nm grain size were synthesized, and their electrical properties compared with those of samples coarsened from the same material. The nanocrystals showed reduced grain boundary resistance, 104 higher electronic conductivity, and less than one-half the heat of reduction of its coarse-grained counterpart. These properties are attributed to a dominant role of interfacial defect formation.",

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AU - Lavik, E. B.

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AU - Tuller, H. L.

AU - Ying, J. Y.

PY - 1996/7/8

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N2 - It is shown that unique defect thermodynamics and transport properties result for oxides of a few nanometers crystallite size. Fully-dense CeO2-x polycrystals of ∼10 nm grain size were synthesized, and their electrical properties compared with those of samples coarsened from the same material. The nanocrystals showed reduced grain boundary resistance, 104 higher electronic conductivity, and less than one-half the heat of reduction of its coarse-grained counterpart. These properties are attributed to a dominant role of interfacial defect formation.

AB - It is shown that unique defect thermodynamics and transport properties result for oxides of a few nanometers crystallite size. Fully-dense CeO2-x polycrystals of ∼10 nm grain size were synthesized, and their electrical properties compared with those of samples coarsened from the same material. The nanocrystals showed reduced grain boundary resistance, 104 higher electronic conductivity, and less than one-half the heat of reduction of its coarse-grained counterpart. These properties are attributed to a dominant role of interfacial defect formation.

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DO - 10.1063/1.117366

M3 - Article

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