Ionic conductivity and its temperature dependence of atmospheric plasma-sprayed yttria stabilized zirconia electrolyte

Zhang, Chao; Li, Chang‐Jiu; Zhang, Ga; Ning, Xianjin; Liao, Hanlin; Coddet, C.

doi:10.1016/j.mseb.2006.10.005

Cited by 131 publications

(64 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For each type of sensor, the high frequency arc was independent of the gas concentration. In addition, the magnitude of the high frequency arc differed on account of the difference in ionic conductivity for PSZ (∼0.08 S/cm) versus FSZ (∼0.14 S/cm) [9]. The higher conductivity of FSZ contributed to the lower high frequency arc impedance.…”

Section: Electrochemical Responsementioning

confidence: 99%

Managing H2O Cross‐Sensitivity Using Composite Electrolyte NOx Sensors

Murray¹,

Kharashi²,

Adedeji³

2017

Electrochemical Sensors Technology

View full text Add to dashboard Cite

NO x sensors composed of partially stabilized zirconia (PSZ), fully stabilized zirconia (FSZ), and PSZ-FSZ composite electrolytes were investigated using impedance spectroscopy under dry and humidified gas conditions. The impedance data were used to interpret the electrochemical behavior of the various sensors as the water concentration in the gas stream varied. The sensors were operated in the presence of 0-100 ppm NO with 1-18% O 2 and 3-10% H 2 O with N 2 as the balance gas. The operating temperature of the sensors ranged from 600 to 700 C. The impedance response for sensors containing ≥ 50 vol% PSZ slightly decreased under humidified gas conditions, in comparison to dry gas conditions; whereas, a significant increase in impedance occurred for sensor largely containing FSZ. This indicated water cross-sensitivity was substantial at FSZbased sensors. The microstructural properties, NO x sensitivity, oxygen partial pressure and temperature dependence, as well as the response time of the sensors composed of the various electrolytes were characterized in order to interpret the electrochemical response with respect to water cross-sensitivity. Analysis of the data indicated that sensors composed of a PSZ-FSZ composite electrolyte with 50 vol% PSZ were more suitable for detecting NO x while limiting water cross-sensitivity.

show abstract

Section: Electrochemical Responsementioning

confidence: 99%

Managing H2O Cross‐Sensitivity Using Composite Electrolyte NOx Sensors

Murray¹,

Kharashi²,

Adedeji³

2017

Electrochemical Sensors Technology

View full text Add to dashboard Cite

show abstract

“…Compared with these ionic conductivity measurements' data, plasma sprayed YSZ thin films show a high potential for SOFC element production. Investigations by Zhang et al [10] indicate that ionic conductivity of YSZ coatings deposited by APS has been one-fifth to one-third of corresponding bulk materials.…”

Section: Resultsmentioning

confidence: 99%

Microstructure and properties of plasma sprayed Al-doped YSZ coatings

Milieška¹,

Brinkienė²,

Kėželis³

et al. 2009

Lithuanian J. Phys.

View full text Add to dashboard Cite

The influence of alumina additive from 1 to 5 wt. % upon the microstructure and ionic conductivity of ZrO2-8 mol % Y2O3 (YSZ) ceramics, deposited by means of plasma spray technology, was investigated. Plasma sprayed films have been analysed using scanning electron microscopy (SEM) and X-ray analysis (XRD). The microstructural examination reveals that alumina addition decreases the porosity and microcracks of plasma sprayed YSZ. Analysis of SEM micrographs shows that the amount of 5 wt. % alumina substantially improves the microstructure of plasma sprayed zirconia. The crystal structure of all plasma sprayed samples consists of cubic zirconia and α-alumina. By the data of ionic conductivity measurements, no significant influence of annealing at 1073 K for 10 h was noticed on characteristic temperature dependences of σ for plasma sprayed YSZ. Alumina doping from 2 to 5 wt. % considerably increases the ionic conductivity of plasma sprayed zirconia. The higher values of ionic conductivity were obtained when 5 wt. % of Al2O3 powder was added to YSZ.

show abstract

“…The density of the as-sintered 8YSZ coating produced by electrophoretic deposition, measured by the Archimedes method, is 72% [12]. YSZ electrolytes were deposited using 8 mol % YSZ powders by atmospheric plasma spraying (APS) with porosity of 8.2% [14]. 7-8% YSZ coatings with density of 4.89-5.18 g/cm 3 were deposited with five different plasma spray systems by plasma spraying [15].…”

Section: Resultsmentioning

confidence: 99%

Influence of plasma jet temperature on the synthesis and structure of YSZ coatings

Kavaliauskas¹,

Brinkienė²,

Čėsnienė³

et al. 2009

Lithuanian J. Phys.

View full text Add to dashboard Cite

The paper describes a process for preparation of yttria stabilized zirconia (YSZ) coatings by plasma spray technique employing non-equilibrium plasma spray technology at atmospheric pressure. Yttria-stabilized zirconia (10-15 wt. % Y2O3) powders (10-105 µm in diameter) have been used. Plasma sprayed coatings have been characterized using scanning electron microscope (SEM) and X-ray diffractometer (XRD) for the microstructural study and phase analysis as a part of a process optimisation study. The dependence of microstructure of coatings on initial powder characteristics and the influence of deposition temperature in the range of 3000-3350• C on the structural characteristics of plasma sprayed coatings were investigated. By the data of XRD analysis, all samples were obtained with cubic crystal orientation. It has been found that crystallite size has tendency to decrease with increasing the deposition temperature. YSZ deposited at 3150-3350• C are found to have a nanocrystalline structure with average crystallite size of 75 nm. The samples sprayed using coarse-grained powder feed are characterized by larger grain size and crystallite size. The main parameters influencing the coating formation are the properties of the initial powder and the plasma process temperature. The SEM analysis showed that the best temperature region for the deposition of YSZ coatings was about 3200-3350• C.

show abstract

Ionic conductivity and its temperature dependence of atmospheric plasma-sprayed yttria stabilized zirconia electrolyte

Cited by 131 publications

References 42 publications

Managing H2O Cross‐Sensitivity Using Composite Electrolyte NOx Sensors

Managing H2O Cross‐Sensitivity Using Composite Electrolyte NOx Sensors

Microstructure and properties of plasma sprayed Al-doped YSZ coatings

Influence of plasma jet temperature on the synthesis and structure of YSZ coatings

Contact Info

Product

Resources

About