Charge carrier dynamics in nanocrystalline Dy substituted ceria based oxygen ion conductors
- Department of Physics, The University of Burdwan, Burdwan-713104 (India)
- (India)
Nano-crystalline Ce{sub 1-x}Dy{sub x}O{sub 2-δ} (x = 0.1-0.5) materials were prepared using the low temperature citrate auto-ignition method. The Rietveld analysis of the XRD data confirmed the single phase cubic fluorite structure. The particle sizes of the sintered samples are in nano range and lattice parameter increases with Dy concentration. Polydispersed and agglomerated particles are observed by SEM. The EDAX spectra show good stoichiometry of the different atoms in the samples. The conductivity is found to have both grain and grain boundary contribution and shows highest value at x= 0.2. The frequency dependence of dielectric permittivity has been analyzed using Havrilliak-Negami formalism. The variation in different electrical properties has been explained by formation defect associates and their interaction with charge carriers.
- OSTI ID:
- 22591259
- Journal Information:
- AIP Conference Proceedings, Vol. 1728, Issue 1; Conference: ICC 2015: International conference on condensed matter and applied physics, Bikaner (India), 30-31 Oct 2015; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CERIUM OXIDES
CHARGE CARRIERS
CITRATES
CONCENTRATION RATIO
CRYSTALS
CUBIC LATTICES
DIELECTRIC MATERIALS
DYSPROSIUM COMPOUNDS
FREQUENCY DEPENDENCE
GRAIN BOUNDARIES
IONIC CONDUCTIVITY
LATTICE PARAMETERS
NANOSTRUCTURES
OXYGEN IONS
PARTICLE SIZE
PERMITTIVITY
SCANNING ELECTRON MICROSCOPY
X-RAY DIFFRACTION
X-RAY SPECTRA