Ionic Conductivity and Coordination Number of Cations in Ce1-xYxO2-x/2

Xiao Hu Xie; Kai Qi Liu; Fen Rong Yang; Yu Ding

doi:10.4028/www.scientific.net/KEM.633.406

Paper Titles

The Effect of La Substitution on the Ferroelectric Properties of Bi₄Ti₃O₁₂ Ceramics
p.390

Effect of Sc₂O₃/V₂O₅ Substitution on the Ferroelectric Properties of Bi₄Ti₃O₁₂ Ceramics
p.394

The Influence of Pulse Width on Microstructure and Mechanical Properties of CrNx Coatings Deposited by HPPMS
p.398

Influence of HF-SCG Immersion Treatment on Corrosion Resistance of the Ultrasonic Micro-Arc Oxidation Bio-Coating on Pure Magnesium
p.402

Ionic Conductivity and Coordination Number of Cations in Ce_1-xY_xO_2-x/2
p.406

Advances in Deformation Performance of Concrete with Steel Slag and Scrap Tire Particles
p.410

The Effect of n-TiO₂ on Corrosion and Biological Activity of Biocoatings Coated by Ultrasound Micro-Arc Oxidation on Pure Magnesium
p.418

Effect of Gd₂O₃/BaF₂ Addition on Dielectric Behavior and Energy Storage Properties of Strontium Barium Niobate Glass-Ceramics
p.422

Fracture Features of Mullite Ceramic Regenerative Material under Thermal Shock Condition
p.427

HomeKey Engineering MaterialsKey Engineering Materials Vol. 633Ionic Conductivity and Coordination Number of...

Ionic Conductivity and Coordination Number of Cations in Ce_1-xY_xO_2-x/2

Abstract:

Yttria doped ceria display higher ionic conductivity and stabilized phase which possess more advantage for solid oxide fuel cells. By using molecular dynamics simulation, the lattice parameter and oxygen conductivity of Ce_1-xY_xO_2-x/2 (x = 0 - 0.65) at 1273 k have been investigated. Lattice parameters and ionic conductivity both increase with yttria doping while x < 0.15 but over doping of yttria lead to a decreasing trend on them. It is suggested that the closing distance of cation-anion is responsible for this decreasing. The coordination numbers of cations were also analyzed. The results showed that the vacancies prefer to locate near Y ions and vacancy ordering is independent with vacancy content.

You might also be interested in these eBooks

Testing and Evaluation of Inorganic Materials V

View Preview

Info:

Periodical:

Key Engineering Materials (Volume 633)

Pages:

406-409

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.633.406

Citation:

Cite this paper

Online since:

November 2014

Authors:

Xiao Hu Xie, Kai Qi Liu, Fen Rong Yang, Yu Ding

Keywords:

Ionic Conductivity, Molecular Dynamic (MD), Vacancy Ordering, Yttria Doped Ceria

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

Citation:

References

[1] J. B. Goodenough, Ceramic technology: Oxide-ion conductors by design. Nature, 6780 (2000) 821-823.

DOI: 10.1038/35009177

Google Scholar

[2] S.Q. Hui, et al., A brief review of the ionic conductivity enhancement for selected oxide electrolytes. J. Power. Sources. 172 (2007) 493-502.

DOI: 10.1016/j.jpowsour.2007.07.071

Google Scholar

[3] X. Xie, R.V. Kumar, J. Sun, et al. Structure and conductivity of yttria-stabilized zirconia co-doped with Gd2O3: A combined experimental and molecular dynamics study, J. Power Sources. 195 (2010) 5660-5665.

DOI: 10.1016/j.jpowsour.2010.03.054

Google Scholar

[4] X. Xie, J. Sun, C. Brigden, et al. Understanding the relationship between dopant and ionic transport in yttria-doped ceria-zirconia. J. Mater. Chem., 26(2011). 9570-9575.

DOI: 10.1039/c1jm10884k

Google Scholar

[5] T.H. Yeh, C.C. Chou, Doping effect and vacancy formation on ionic conductivity of zirconia ceramics. J. Phy. Chem. Sol., 69(2008) 386-392.

DOI: 10.1016/j.jpcs.2007.07.117

Google Scholar