The effect of grain size on the low-temperature electrical conductivity of doped CeO2
SCIE
SCOPUS
- Title
- The effect of grain size on the low-temperature electrical conductivity of doped CeO2
- Authors
- Kang, YJ; Park, HJ; Choi, GM
- Date Issued
- 2008-09-30
- Publisher
- ELSEVIER SCIENCE BV
- Abstract
- Alumina was added to doped ceria and its effect on the grain conductivity was studied. The electrical conductivities of Gd, Sm, or Y-doped ceria (CeO2) with or without alumina addition were measured as a function of temperature (250-700 degrees C) in air. Impedance measurement enabled the separation of the grain conductivity and the grain boundary conductivity. With alumina addition of 1, 2, and 5 mol%, the grain conductivity of alumina-added samples below 400 degrees C increased with the accompanied grain size increase and the migration enthalpy decrease. A model was proposed to explain the observation that includes the low-conductivity region in the grain of doped ceria. (C) 2008 Elsevier B.V. All rights reserved.
- Keywords
- doped ceria; alumina; electrical conductivity; grain size; migration enthalpy; IONIC-CONDUCTIVITY; ALUMINA ADDITION; CE0.8GD0.2O2-DELTA CERAMICS; SOLID ELECTROLYTES; CERIA; MICROSTRUCTURE
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/22506
- DOI
- 10.1016/j.ssi.2008.01.069
- ISSN
- 0167-2738
- Article Type
- Article
- Citation
- SOLID STATE IONICS, vol. 179, no. 27-32, page. 1602 - 1605, 2008-09-30
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- There are no files associated with this item.
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