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.

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.

Ionic conductivity in nanocrystalline Gd doped ceria

2008 ◽  
Vol 1122 ◽  
Author(s):  
Gianguido Baldinozzi ◽  
David Simeone ◽  
Dominique Gosset ◽  
Mickael Dollé ◽  
Georgette Petot-Ervas
Keyword(s):  
Grain Size ◽  
Ionic Conductivity ◽  
Sol Gel ◽  
Doped Ceria ◽  
Narrow Size Distribution ◽  
Conductivity Measurements ◽  
X Ray Diffraction ◽  
X Ray ◽  
Grain Sizes ◽  
The Impact

AbstractWe have synthesized Gd-doped ceria polycrystalline samples (5, 10, 15 %mol), having relative densities exceeding 95% and grain sizes between 30 and 160 nm after axial hot pressing (750 °C, 250 MPa). The samples were prepared by sintering nanopowders obtained by sol-gel chemistry methods having a very narrow size distribution centered at about 16 nm. SEM and X-ray diffraction were performed to characterize the sample microstructures and to assess their structures. We report ionic conductivity measurements using impedance spectroscopy. It is important to investigate the properties of these systems with sub-micrometric grains and as a function of their composition. Therefore, samples having micrometric and nanometric grain sizes (and different Gd content) were studied. Evidence of Gd segregation near the grain boundaries is given and the impact on the ionic conductivity, as a function of the grain size and Gd composition, is discussed and compared to microcrystalline samples.

scholarly journals Chemical and structural effects on ionic conductivity at columnar grain boundaries in yttria-stabilized zirconia thin films

2014 ◽  
Vol 122 (1426) ◽  
pp. 430-435 ◽  
Author(s):  
Takanori KIGUCHI ◽  
Yumiko KODAMA ◽  
Toyohiko J. KONNO ◽  
Hiroshi FUNAKUBO ◽  
Osamu SAKURAI ◽  
...  
Keyword(s):  
Thin Films ◽  
Ionic Conductivity ◽  
Grain Boundaries ◽  
Yttria Stabilized Zirconia ◽  
Structural Effects ◽  
Stabilized Zirconia ◽  
Columnar Grain

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

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

Comparison of the in- and across-plane ionic conductivity of highly oriented neodymium doped ceria thin films

2018 ◽  
Vol 147 ◽  
pp. 10-15 ◽  
Author(s):  
George Baure ◽  
Hanhan Zhou ◽  
Ching-Chang Chung ◽  
Marissa N. Buck ◽  
Mariia A. Stozhkova ◽  
...  
Keyword(s):  
Thin Films ◽  
Ionic Conductivity ◽  
Doped Ceria

Structure and ionic conductivity of nanoscale gadolinia-doped ceria thin films

2013 ◽  
Vol 249-250 ◽  
pp. 139-143 ◽  
Author(s):  
Jun Jiang ◽  
Weida Shen ◽  
Joshua L. Hertz
Keyword(s):  
Thin Films ◽  
Ionic Conductivity ◽  
Doped Ceria
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