Hydrostatic pressure decreases the proton mobility in the hydrated BaZr{sub 0.9}Y{sub 0.1}O{sub 3} proton conductor

Impedance spectroscopy on the hydrated proton conductor BaZr{sub 0.9}Y{sub 0.1}O{sub 3} at high temperatures shows that the bulk proton conductivity activation energy E{sub b} scales with the strain parameter epsilon, as achieved by hydrostatic pressures up to 2 GPa, suggesting that large lattices f...

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Bibliographic Details
Published in:Applied physics letters 2010-07, Vol.97 (4)
Main Authors: Chen Qianli, Department of Physics, Swiss Federal Institute of Technology, ETH Zuerich, CH-8057 Zuerich, Braun, Artur, Ovalle, Alejandro, Savaniu, Cristian-Daniel, Graule, Thomas, Technische Universitaet Bergakademie Freiberg, D-09596 Freiberg, Bagdassarov, Nikolai
Format: Article
Language:English
Subjects:
ACTIVATION ENERGY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARYONS
CARRIER MOBILITY
CHALCOGENIDES
CHEMISTRY
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROCHEMISTRY
ELEMENTARY PARTICLES
ENERGY
FABRICATION
FERMIONS
GRAIN BOUNDARIES
HADRONS
IMPEDANCE
IONIC CONDUCTIVITY
MATERIALS SCIENCE
MECHANICAL PROPERTIES
MICROSTRUCTURE
MOBILITY
NUCLEONS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PRESSURE RANGE
PRESSURE RANGE GIGA PA
PROTON CONDUCTIVITY
PROTONS
SINTERING
SPECTROSCOPY
TENSILE PROPERTIES
THIN FILMS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
ZIRCONIUM COMPOUNDS
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Summary:Impedance spectroscopy on the hydrated proton conductor BaZr{sub 0.9}Y{sub 0.1}O{sub 3} at high temperatures shows that the bulk proton conductivity activation energy E{sub b} scales with the strain parameter epsilon, as achieved by hydrostatic pressures up to 2 GPa, suggesting that large lattices favor proton diffusivity. At high temperature, E{sub b} increases upon pressure by 40%. The grain boundary activation energy Eg is around twice as E{sub b}, indicating higher proton mobility in grain boundaries as a result of pressure induced sintering. An expanded lattice with strain parameter epsilon>1 should have lower E{sub b}, suggesting that thin films expansive tensile strain could have larger proton conductivity.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3464162