Ionic conductivity and activation energy for oxygen ion transport in superlattices — The multilayer system CSZ (ZrO2+CaO)/Al2O3

2007 ◽  
Vol 178 (1-2) ◽  
pp. 67-76 ◽  
Author(s):  
A PETERS ◽  
C KORTE ◽  
D HESSE ◽  
N ZAKHAROV ◽  
J JANEK
Keyword(s):  
Activation Energy ◽  
Ionic Conductivity ◽  
Ion Transport ◽  
Multilayer System ◽  
Oxygen Ion

Ionic conductivity enhancement in Gd2Zr2O7 pyrochlore by Nd doping

2008 ◽  
Vol 23 (4) ◽  
pp. 911-916 ◽  
Author(s):  
B.P. Mandal ◽  
S.K. Deshpande ◽  
A.K. Tyagi
Keyword(s):  
Activation Energy ◽  
Ionic Conductivity ◽  
Preexponential Factor ◽  
Dc Conductivity ◽  
Rare Earth Ions ◽  
X Ray Diffraction ◽  
Conductivity Enhancement ◽  
Mobile Species ◽  
Oxygen Ion ◽  
Mobile Ions

The pyrochlore compositions Gd2–yNdyZr2O7 (y = 0.0, 0.1, 0.4, 0.6, 1.0, 1.4, 1.6, and 2.0) were synthesized, and their ionic conductivity was determined (100 Hz–15 MHz, 622–696 K). The direct-current (dc) conductivity (σdc) varies upon Nd substitution at the Gd site, and a peaking effect in σdc was observed around y = 1.0. This indicates that a significant increase in conductivity can be obtained at moderately high temperatures by suitable doping at the Gd site with isovalent rare-earth ions like Nd. The extent of oxygen ion disorder determined from x-ray diffraction was found to decrease with increasing Nd content. The dc conductivity obeys the Arrhenius relation σdcT = σ0 exp(−E/kBT). The activation energy E and the preexponential factor σ0, which is a measure of the concentration of the mobile species, increase while going from the ordered Nd2Zr2O7 to the least ordered Gd2Zr2O7. These two processes presumably lead to the peaking of σdc at an intermediate Nd content. Our results also suggest that the cooperative motion of mobile ions does not contribute much to the increase in activation energy in this compound.

scholarly journals Ionic Conductivity of Chitosan-based Polymer Electrolyte with Polyethylene Glycol (PEG) as Plasticizer and KCl as Alkaline Ion Transport Source

2018 ◽  
Vol 4 (1) ◽  
pp. 13
Author(s):  
Akhiruddin Maddu ◽  
Muhamar Kadapi ◽  
Irmansyah Sofian
Keyword(s):  
Activation Energy ◽  
Polyethylene Glycol ◽  
Ionic Conductivity ◽  
Ion Transport ◽  
Polymer Electrolyte ◽  
Composite Polymer Electrolyte ◽  
Mixed Solution ◽  
Composite Polymer ◽  
Electrolyte Film ◽  
Polymer Electrolyte Film

Polymer electrolyte films were fabricated utilizing chitosan biopolymer plasticized with polyethylene glycol (PEG) and KCl addition as ionic transport source. The precursor solution was prepared by mixing the chitosan in acetic acid solution and PEG that act as a plasticizer. Into the mixed solution was added KCl salt for as alkalin ion transport source in the polymer electrolyte. The polymer electrolyte films were fabricated by the casting method onto the petri glass. The influence of KCl content on ionic conductivity of the composite polymer electrolyte film was studied. The ionic conductivity of the composite polymer electrolyte film was characterized using LCR meter at a frequency of 1 kHz. The best ionic conductivity was found for the film containing 45 wt% of KCl salt. The activation energy was determined by using Arrhenius plot based on conductivity data at varied temperature. It has been found that the activation energy of the composite polymer electrolyte films varied to the KCL content in the composite polymer electrolyte films. The highest activation energy was found for the polymer electrolyte film with 45 wt% of KCl content.

Structural features and enhanced high-temperature oxygen ion transport in SrFe1−xTaxO3−δ

2013 ◽  
Vol 197 ◽  
pp. 191-197 ◽  
Author(s):  
Alexey A. Markov ◽  
Elizaveta V. Shalaeva ◽  
Alexander P. Tyutyunnik ◽  
Vasily V. Kuchin ◽  
Mikhail V. Patrakeev ◽  
...  
Keyword(s):  
High Temperature ◽  
Ion Transport ◽  
Structural Features ◽  
Oxygen Ion

Oxygen ion transport in La2NiO4‐based ceramics

1999 ◽  
Vol 9 (10) ◽  
pp. 2623-2629 ◽  
Author(s):  
Vladislav V. Kharton ◽  
Alexandre P. Viskup ◽  
Eugene N. Naumovich ◽  
Fernando M. B. Marques
Keyword(s):  
Ion Transport ◽  
Oxygen Ion

scholarly journals Bombardment induced ion transport – part IV: ionic conductivity of ultra-thin polyelectrolyte multilayer films

2016 ◽  
Vol 18 (6) ◽  
pp. 4345-4351 ◽  
Author(s):  
Veronika Wesp ◽  
Matthias Hermann ◽  
Martin Schäfer ◽  
Jonas Hühn ◽  
Wolfgang J. Parak ◽  
...  
Keyword(s):  
Ionic Conductivity ◽  
Ion Transport ◽  
Multilayer Films ◽  
Low Energy ◽  
Ionic Conductance ◽  
Polyelectrolyte Multilayer ◽  
Transport Part

Low energy bombardment induced ion transport (BIIT) studies demonstrate that the ionic conductance of ultra-thin polyelectrolyte multilayer (PEM) films depends non-monotonically on the number of bilayers.

Activation energy for alkaline-earth ion transport in low alkali aluminoborosilicate glasses

2013 ◽  
Vol 102 (8) ◽  
pp. 082904 ◽  
Author(s):  
Priyanka Dash ◽  
Eugene Furman ◽  
Carlo G. Pantano ◽  
Michael T. Lanagan
Keyword(s):  
Activation Energy ◽  
Ion Transport ◽  
Alkaline Earth

scholarly journals Test of Anderson-Stuart model in sodium silicate glasses and the general Arrhenian conductivity rule in wide composition range

Cerâmica ◽  
2006 ◽  
Vol 52 (321) ◽  
pp. 22-30 ◽  
Author(s):  
M. L. F. Nascimento ◽  
E. Nascimento ◽  
W. M. Pontuschka ◽  
M. Matsuoka ◽  
S. Watanabe
Keyword(s):  
Activation Energy ◽  
Ionic Conductivity ◽  
Sodium Silicate ◽  
Composition Range ◽  
Absolute Temperature ◽  
Alkali Concentration ◽  
Relative Dielectric Permittivity ◽  
Silicate System ◽  
Wide Composition Range ◽  
Sigma E

We collected and analyzed literature data on ionic conductivity sigma and activation energy E A in the binary sodium silicate system in a wide composition range. The Anderson and Stuart model has been considered to describe the decreasing tendency of activation energy E A with alkali concentration in this system. In this analysis were considered experimental parameters, such as shear modulus G and relative dielectric permittivity epsilon. A general conductivity rule is found in 194 of 205 glasses, when one plots log sigma vs. E A/kB T, where kB is the Boltzmann constant and T is the absolute temperature. This fact means that the arrhenian relation has universal uniqueness of form sigma = sigma (E A,T) in wide Na2O composition range. The results also show that there is strong correlation by more than 19 orders of magnitude on conductivity with E A/kBT. An explanation for this behavior links ionic conductivity and microscopic structure. The problem of phase separation in this system is also considered.

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