scholarly journals Grain boundary blocking of ionic conductivity in nanocrystalline yttria-doped ceria thin films

2015 ◽  
Vol 104 ◽  
pp. 45-48 ◽  
Author(s):  
Jihwan An ◽  
Jiwoong Bae ◽  
Soonwook Hong ◽  
Bongjun Koo ◽  
Young-Beom Kim ◽  
...  
Keyword(s):  
Thin Films ◽  
Ionic Conductivity ◽  
Grain Boundary ◽  
Doped Ceria ◽  
Yttria Doped Ceria

scholarly journals High Pressure X-ray Diffraction as a Tool for Designing Doped Ceria Thin Films Electrolytes

Coatings ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 724
Author(s):  
Sara Massardo ◽  
Alessandro Cingolani ◽  
Cristina Artini
Keyword(s):  
Thin Films ◽  
High Pressure ◽  
Rare Earth ◽  
Ionic Conductivity ◽  
Bulk Material ◽  
Threshold Temperature ◽  
Doped Ceria ◽  
X Ray Diffraction ◽  
X Ray ◽  
Rare Earth Doped

Rare earth-doped ceria thin films are currently thoroughly studied to be used in miniaturized solid oxide cells, memristive devices and gas sensors. The employment in such different application fields derives from the most remarkable property of this material, namely ionic conductivity, occurring through the mobility of oxygen ions above a certain threshold temperature. This feature is in turn limited by the association of defects, which hinders the movement of ions through the lattice. In addition to these issues, ionic conductivity in thin films is dominated by the presence of the film/substrate interface, where a strain can arise as a consequence of lattice mismatch. A tensile strain, in particular, when not released through the occurrence of dislocations, enhances ionic conduction through the reduction of activation energy. Within this complex framework, high pressure X-ray diffraction investigations performed on the bulk material are of great help in estimating the bulk modulus of the material, and hence its compressibility, namely its tolerance toward the application of a compressive/tensile stress. In this review, an overview is given about the correlation between structure and transport properties in rare earth-doped ceria films, and the role of high pressure X-ray diffraction studies in the selection of the most proper compositions for the design of thin films.

Sintering behaviour and ionic conductivity of yttria-doped ceria

1996 ◽  
Vol 16 (9) ◽  
pp. 961-973 ◽  
Author(s):  
Jan Van herle ◽  
Teruhisa Horita ◽  
Tatsuya Kawada ◽  
Natsuko Sakai ◽  
Harumi Yokokawa ◽  
...  
Keyword(s):  
Ionic Conductivity ◽  
Doped Ceria ◽  
Sintering Behaviour ◽  
Yttria Doped Ceria

Microstructure and ionic conductivity of alternating-multilayer structured Gd-doped ceria and zirconia thin films

2009 ◽  
Vol 44 (8) ◽  
pp. 2021-2026 ◽  
Author(s):  
Yiguang Wang ◽  
Linan An ◽  
L. V. Saraf ◽  
C. M. Wang ◽  
V. Shutthanandan ◽  
...  
Keyword(s):  
Thin Films ◽  
Ionic Conductivity ◽  
Doped Ceria

Effect of Doping Concentration on Grain Boundary Conductivity of Samaria Doped Ceria Composites

2021 ◽  
Author(s):  
Prerna Vinchhi ◽  
Roma Patel ◽  
Indrajit Mukhopadhyay ◽  
Abhijit Ray ◽  
Ranjan Pati
Keyword(s):  
Ionic Conductivity ◽  
Grain Boundary ◽  
Doping Concentration ◽  
Single Phase ◽  
Precipitation Method ◽  
Molecular Water ◽  
Doped Ceria ◽  
Boundary Conductivity ◽  
Co Precipitation ◽  
Hydrated Oxide

Abstract This work aims to study the effect of Sm3+ doping concentration on the grain boundary ionic conductivity of ceria. The materials were prepared by a modified co-precipitation method, where molecular water associated with the precursor has been utilized to facilitate the hydroxylation process. The synthesized hydroxide / hydrated oxide materials were calcined and the green body (pellet) has been sintered at high temperature in order to achieve highly dense (~ 96 %) pellet. The structural analyses were done using XRD and Raman spectroscopy, which confirm the single phase cubic structure of samaria doped ceria (SDC) nanoparticles and the surface morphology of sintered samples was studied using FESEM. The ionic conductivity was measured by AC impedance spectroscopy of the sintered pellets in the temperature range of 400-700 °C, which shows superior grain boundary conductivity. The grain boundary ionic conductivity of around 0.111 S/cm has been obtained for 15SDC composition at 600 °C.

Across plane ionic conductivity of highly oriented neodymium doped ceria thin films

2015 ◽  
Vol 17 (18) ◽  
pp. 12259-12264 ◽  
Author(s):  
G. Baure ◽  
R. M. Kasse ◽  
N. G. Rudawski ◽  
J. C. Nino
Keyword(s):  
Thin Films ◽  
Ionic Conductivity ◽  
Grain Boundaries ◽  
Doped Ceria ◽  
Conductivity Measurements

Across-plane ionic conductivity measurements of PLD-grown, highly-oriented, columnar-grained Nd0.1Ce0.9O2−δ films reveal the insulating characteristics of grain boundaries in ceria electrolytes.

Integrated experimental and modeling study of the ionic conductivity of samaria-doped ceria thin films

2011 ◽  
Vol 204-205 ◽  
pp. 13-19 ◽  
Author(s):  
R. Sanghavi ◽  
R. Devanathan ◽  
M.I. Nandasiri ◽  
S. Kuchibhatla ◽  
L. Kovarik ◽  
...  
Keyword(s):  
Thin Films ◽  
Ionic Conductivity ◽  
Doped Ceria ◽  
Modeling Study

Grain orientation effects on the ionic conductivity of neodymia doped ceria thin films

2017 ◽  
Vol 133 ◽  
pp. 81-89 ◽  
Author(s):  
George Baure ◽  
Hanhan Zhou ◽  
Ching-Chang Chung ◽  
Mariia A. Stozhkova ◽  
Jacob L. Jones ◽  
...  
Keyword(s):  
Thin Films ◽  
Ionic Conductivity ◽  
Grain Orientation ◽  
Doped Ceria ◽  
Orientation Effects
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