scholarly journals A generalised space-charge theory for extended defects in oxygen-ion conducting electrolytes: from dilute to concentrated solid solutions

2015 ◽  
Vol 8 (10) ◽  
pp. 2935-2940 ◽  
Author(s):  
David S. Mebane ◽  
Roger A. De Souza
Keyword(s):  
Space Charge ◽  
Solid Solutions ◽  
Solid Electrolytes ◽  
Extended Defects ◽  
Oxygen Ion ◽  
Interface Defect ◽  
Poisson Boltzmann ◽  
Ion Conducting

The standard Poisson–Boltzmann approach to modeling the near-interface defect behaviour in solid electrolytes performs well at low dopant concentrations but its applicability is questionable at higher dopant levels where interactions become important.

The Research about La0.8Sr0.2CoO3 Application as Dense Diffusion Barrier in Limiting Current Oxygen Sensors

2013 ◽  
Vol 703 ◽  
pp. 111-114
Author(s):  
Yin Lin Wu ◽  
Hai Yan Zhao ◽  
Fu Shen Li
Keyword(s):  
Diffusion Barrier ◽  
Solid Electrolytes ◽  
Oxygen Sensor ◽  
Low Cost ◽  
Limiting Current ◽  
Stabilized Zirconia ◽  
Long Term Stability ◽  
Oxygen Ion ◽  
Ion Conducting

The fabrication and operation of a new thick film type of limiting current oxygen sensor is demonstrated that utilizes yttria (8% mol) stabilized zirconia (YSZ) as oxygen ion conducting solid electrolytes and dense La0.8Sr0.2CoO3(LSC) as diffusion barrier. The oxygen sensor shows a near linear response between 0 to 10.5% O2in argon at 1023K. The advantages of the sensor are simple construction, low cost and potential long term stability.

Limiting Current Oxygen Sensors with LSM as Dense Diffusion Barrier

2008 ◽  
Vol 368-372 ◽  
pp. 263-264
Author(s):  
Yin Lin Wu ◽  
Ling Wang ◽  
Fu Shen Li ◽  
Yan Qin Zhao
Keyword(s):  
Diffusion Barrier ◽  
Solid Electrolytes ◽  
Oxygen Sensor ◽  
Low Cost ◽  
Limiting Current ◽  
Excellent Performance ◽  
Long Term Stability ◽  
Oxygen Ion ◽  
Ion Conducting

A thick film type of limiting current oxygen sensor which uses yttria (8% mol) stabilized zirconia (YSZ) as oxygen ion conducting solid electrolytes and dense La0.8Sr0.2MnO3 (LSM) as diffusion barrier was developed successfully. The oxygen sensor showed excellent performance at oxygen concentrations ranging from 0 to 10 ppm. The advantages of the sensor are simple construction, low cost and potential long term stability.

Microstructure and dielectric properties of (La0.9Sr0.1)[(Ga1−x Crx)0.8Mg0.2]O3−δ (x = 0−0.35) oxygen-ion-conducting solid solutions

2006 ◽  
Vol 42 (7) ◽  
pp. 806-814 ◽  
Author(s):  
E. D. Politova ◽  
B. A. Loginov ◽  
G. M. Kaleva ◽  
A. V. Mosunov ◽  
S. G. Prutchenko
Keyword(s):  
Dielectric Properties ◽  
Solid Solutions ◽  
Oxygen Ion ◽  
Ion Conducting

Crystal Chemistry of Y2(ZrySn1-y)2O7 Pyrochlore Solid Solutions and its Relation to Fast-Ion Conduction

1998 ◽  
Vol 547 ◽  
Author(s):  
Esther M. Ku ◽  
Evangeline M.E. Yeo ◽  
Bernhardt J. Wuensch
Keyword(s):  
Solid Solutions ◽  
Rietveld Analysis ◽  
Fuel Cell Materials ◽  
Oxygen Ion ◽  
Ion Conducting ◽  
A Site ◽  
Fast Ion ◽  
Cation Sites ◽  
Electronic Conductors ◽  
Progressive Disorder

AbstractPyrochlore oxides, A2B2O7, are of interest as fuel cell materials and sensors because, with suitable doping, they may be fast-ion conducting or p- or n-type electronic conductors. An earlier analysis of Y2(ZryTi1-y)2O7 solid solutions showed that substitution of the larger Zr ion for Ti induced progressive disorder in both the cation and anion arrays causing a 103 increase in oxygen ion conductivity. In contrast, Y2(SnyTi1-y)2O7 solid solutions remained essentially fully ordered over their entire range of composition even though the range of average radii of the cation species in the B site overlapped to a considerable degree with those of the (ZryTi1-y) materials. The present work used Rietveld analysis of both neutron and x-ray powder profiles to examine Y2(ZrySn1-y)2O7 compositions along the third leg of the pseudo-ternary system: solid solutions between the stannate, with strong tendency to remain ordered, and the zirconate which has predilection toward complete disorder. Progressive disorder in the oxygen ion array was again observed with increasing y. Mixing between cation sites was found to progress at a rate independent of anion disordering. The behavior was very similar to Y2(ZryTi1-y)2O7, suggesting that the differing behavior of the three systems is due to the ability of Zr to readily enter the eight-coordinated A site.

Isn't the space-charge potential in ceria-based solid electrolytes largely overestimated?

2016 ◽  
Vol 18 (29) ◽  
pp. 19787-19791 ◽  
Author(s):  
Sangtae Kim
Keyword(s):  
Grain Boundary ◽  
Space Charge ◽  
Potential Barrier ◽  
Solid Solutions ◽  
Solid Electrolytes ◽  
Ceria Solid Solutions ◽  
Space Charge Potential ◽  
Charge Potential

The height of the potential barrier at the grain boundary in concentrated ceria solid solutions found in the literature is largely overestimated.

Limiting Current Oxygen Sensors with LSF as Dense Diffusion Barrier

2007 ◽  
Vol 336-338 ◽  
pp. 417-419 ◽  
Author(s):  
Ling Wang ◽  
Fu Shen Li ◽  
Hui Zhu Zhou ◽  
Hui Xia ◽  
Mei Yang ◽  
...  
Keyword(s):  
Diffusion Barrier ◽  
Solid Electrolytes ◽  
Oxygen Sensor ◽  
Low Cost ◽  
Limiting Current ◽  
Long Term Stability ◽  
Oxygen Ion ◽  
New Type ◽  
Ion Conducting

A new type of limiting current oxygen sensor which uses yttria (8%mol) stabilized zirconia (YSZ) as oxygen ion conducting solid electrolytes and dense La0.8Sr0.2FeO3 (LSF) as diffusion barrier was developed successfully. The oxygen sensor shows excellent performance at oxygen concentrations range of from 0 to 21%. The advantages of the sensor are simple construction, low cost and potential long term stability.

The Research about La0.75Sr0.25Cr0.5Mn0.5O3-δ Application as Dense Diffusion Barrier in Limiting Current Oxygen Sensors

2013 ◽  
Vol 712-715 ◽  
pp. 1838-1842
Author(s):  
Yin Lin Wu ◽  
Qing Hui Wang ◽  
Hai Yan Zhao ◽  
Fu Shen Li
Keyword(s):  
Thick Film ◽  
Diffusion Barrier ◽  
Linear Response ◽  
Solid Electrolytes ◽  
Oxygen Sensor ◽  
Oxygen Sensors ◽  
Limiting Current ◽  
Oxygen Ion ◽  
Film Type ◽  
Ion Conducting

The fabrication and operation of a new thick film type of limiting current oxygen sensor is demonstrated that utilizes YSZ as oxygen ion conducting solid electrolytes and La0.75Sr0.25Cr0.5Mn0.5O3-δ+60% YSZ as dense diffusion barrier. The oxygen sensor shows a near linear response between 0 to 10ppm O2in argon at 973K.

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