Effect of Long- and Short-Range Disorder on the Oxygen Ionic Conductivity of Tm2(Ti2–xTmx)O7–x/2 “Stuffed” Pyrochlores

2021 ◽  
Author(s):  
Bryce G. Mullens ◽  
Zhaoming Zhang ◽  
Maxim Avdeev ◽  
Helen E. A. Brand ◽  
Bruce C. C. Cowie ◽  
...  
Keyword(s):  
Ionic Conductivity ◽  
Short Range ◽  
Oxygen Ionic Conductivity

A Chemical Bonding Approach to Ionic Conduction and Thermal Expansion in Oxide Ion Conductors

2010 ◽  
Vol 72 ◽  
pp. 343-347 ◽  
Author(s):  
Sachi Taniguchi ◽  
Masaru Aniya
Keyword(s):  
Thermal Expansion ◽  
Ionic Conductivity ◽  
Thermal Expansion Coefficient ◽  
Expansion Coefficient ◽  
Ionic Conduction ◽  
Point Of View ◽  
Semiempirical Methods ◽  
Oxygen Ionic Conductivity ◽  
The Difference ◽  
The Individual

In complex perovskite-type oxides which have been studied as cathode materials, the thermal expansion coefficient increases with the increase in the oxygen ionic conductivity. In the present study, with the aim to explain such a behavior, a research has been carried out from a chemical bond point of view. For oxides A1-xA′xB1-yB′yO with perovskite structure, the ionicity of the individual bond, A-O and B-O, and the thermal expansion coefficient of mixed compounds were estimated by using semiempirical methods. It has been shown that the thermal expansion coefficient and the oxygen ionic conductivity decrease with the increase in the difference of the ionicity between A-O and B-O bonds. It is also found that the tolerance factor and the specific free volume are linearly correlated with the difference of ionicity.

Estimation of oxygen ionic conductivity in nickel-zirconia composite by oxygen permeation method

2009 ◽  
Vol 14 (6) ◽  
pp. 945-949 ◽  
Author(s):  
Yan-bo Zuo ◽  
Jian-heng Li ◽  
Qing Zeng ◽  
Wei Liu ◽  
Chu-sheng Chen
Keyword(s):  
Ionic Conductivity ◽  
Oxygen Permeation ◽  
Oxygen Ionic Conductivity

Ionic Conductivity of Poorly Crystalline Apatite: Effect of Maturation

2000 ◽  
Vol 55 (11-12) ◽  
pp. 883-886
Author(s):  
A. Bensaoud ◽  
A. Bouhaouss ◽  
M. Ferhat
Keyword(s):  
Ionic Conductivity ◽  
Frequency Dependence ◽  
Short Range ◽  
Room Temperature ◽  
Ionic Conduction ◽  
Translational Movement ◽  
Mobile Ions

Abstract This study deals with the effect of maturation on the ionic conduction of poorly crystalline synthetic apatite. The tendency of this materials to crystallise during maturation is accompanied by an improvement of its ionic conductivity σ. At room temperature, σ increased by a factor of 300 after 50 days of maturation. The frequency dependence of the ionic conductivity was attenuated gradually during maturation. These results are explained by the short-range organisation of sites with time, and by the fact that the translational movement of the mobile ions becomes less hindered as the material matures.

Oxygen ionic conductivity of NTE materials of cubic Zr1−xLnxW2−yMoyO8−x/2 (Ln=Er, Yb)

2008 ◽  
Vol 10 (8) ◽  
pp. 1037-1041 ◽  
Author(s):  
Hai-Hua Li ◽  
Hai-Ting Xia ◽  
Xi-Ping Jing ◽  
Xin-Hua Zhao
Keyword(s):  
Ionic Conductivity ◽  
Oxygen Ionic Conductivity

scholarly journals An Application of Oxygen Ionic Conductivity of Zirconia to Metal-Zirconia Joining

1989 ◽  
Vol 75 (2) ◽  
pp. 259-266 ◽  
Author(s):  
Kiyoshi NOGI ◽  
Hiroyuki TAKEDA ◽  
Motoki SAKASHITA ◽  
Kazumi OGINO
Keyword(s):  
Ionic Conductivity ◽  
Oxygen Ionic Conductivity
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