Sc3+:Ce4+:Y3+ doped zirconia nanopowders (ScCeYSZ): Synthesis, thermal phase stability and hot corrosion behavior of spark plasma sintered body

Aflaki, Mina; Davar, Fatemeh; Loghman-Estarki, Mohammad Reza; Wang, Ruixue; Gou, Lei

doi:10.1016/j.arabjc.2023.105160

Cited by 3 publications

(6 citation statements)

References 61 publications

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“…The density for the nano‐YSZ, (sample) 1 , (sample) 2 , and (sample) 3 was obtained 98.0% ± 0.20%, 98.9% ± 0.15%, and 99.8% ± 0.20%, and 99.8% ± 0.10% of the theoretical density, respectively. The obtained density was dissimilar from our previous reports 2 due to unlike as‐used graphite die used for this works. In Ref.…”

Section: Resultscontrasting

confidence: 88%

“…But this Zr colony was not observed at (sample) 1 ceramic. It was due to the more acidic nature of selected [1.8 wt.% (Sc 2 O 3 ) 8.3 wt.% (CeO 2 ) 1.9 wt.% (Y 2 O 3 )] than [1.1 wt.% (Sc 2 O 3 ) 9 wt.% (CeO 2 ) 1.9 wt.% (Y 2 O 3 ) and.5 wt.% (Sc 2 O 3 ) 9.6 wt.% (CeO 2 ) 1.9 wt.% (Y 2 O 3 ) stabilized zirconia in contrast to acidic nature molten CMAS salt 2 …”

Section: Resultsmentioning

confidence: 96%

“…In Ref. [2], HT graphite with density of 2.1 g/cm 3 was used but in this work, IM graphite with density of 1.9 g/cm 3 was employed. Various graphite die has different porosities and various temperature gradients during the high temperature of SPS equipments.…”

Section: Resultsmentioning

confidence: 99%

“…In our previous work, phase stability and corrosion resistance of different zirconia doped with three stabilizing phases of scandia, ceria, and yttria (ScCeYSZ) ceramics against vanadium salt were investigated. In our previous work, among 13 types of different stabilizer agents of scandia, cercia, yttria doped zirconia, 3 samples (Table 1) show the best phase stability 2 . In this work, the CMAS corrosion behavior of ScCeYSZ ceramics with mentioned formula in Table 1 was examined.…”

Section: Introductionmentioning

confidence: 95%

“…So far, various compounds have been used as CMAS corrosion‐resistant materials for the stability of the zirconia lattice. Recently, great attention has been paid to doping ceramic oxides such as CeO 2 , Sc 2 O 3 , Al 2 O 3 , Yb 2 O 3 , TiO 2 , Gd 2 O 3 , In 2 O 3 , and MgO in the zirconia lattice 1,2 . Metal oxide ceramics has many applications in different industrial areas 3,4 like thermal barrier coating and refractory ceramic 5,6 …”

Section: Introductionmentioning

confidence: 99%

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CMAS corrosion resistance of scandia, ceria, yttria‐stabilized zirconia ceramic

Aflaki,

Davar

2024

Int J Applied Ceramic Tech

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Sc2O3–CeO2–Y2O3– stabilized zirconia (ScCeYSZ) nanoparticles with different percentages of stabilizer agents [sample1: 1.8 wt.% (Sc2O3) 8.3 wt.% (CeO2) 1.9 wt.% (Y2O3), sample 2: 1.1 wt.% (Sc2O3) 9.0 wt.% (CeO2) 1.9 wt.% (Y2O3), sample 3: .5 wt.% (Sc2O3) 9.6 wt.% (CeO2) 1.9 wt.% (Y2O3) stabilized zirconia] were synthesized with Pechini method and consolidated by spark plasma sintered method. The results showed that despite the [(sample)1: 1.8 wt.% (Sc2O3) 8.3 wt.% (CeO2) 1.9 wt.% (Y2O3)] had lower density and higher porosity percentage compared to other samples, it had better calcium–magnesium–alumina–silicate (CMAS) corrosion resistance compared to other samples and the yttria‐stabilized zirconia nanopowders (nano‐YSZ) sample. It was due to the higher acidic nature and tetragonality of the (sample)1 sintered body compared to other samples and YSZ ceramic in the CMAS corrosive medium. Moreover, the results of phase and microstructural analysis following CMAS corrosion revealed the formation of the monoclinic phase and rod‐shaped CaAl2Si2O8 particles on the surface of the sampled sintered sample. However, the nano‐YSZ sample corroded homogenously and delamination occurred after the CMAS corrosion test.

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Section: Resultscontrasting

confidence: 88%

Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

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CMAS corrosion resistance of scandia, ceria, yttria‐stabilized zirconia ceramic

Aflaki,

Davar

2024

Int J Applied Ceramic Tech

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The explanation of electrical properties changes under NH3 and H2 containing atmospheres in risen temperatures of ceria- and zirconia-based solid electrolytes by means of electrochemical impedance spectroscopy

Dziubaniuk

2024

Preprint

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In the presented research, commercial powders of nominal compositions: Ce0.8Gd0.2O1.9, Sc0.1Ce0.01Zr0.89O1.95, Sc0.09Yb0.01Zr0.9O1.95 structural and electrochemical properties were investigated. The X-ray diffraction of the specimens at room temperature showed a cubic phase. Electrical properties studies over a wide range of frequencies (0.1 Hz to 32 MHz) and temperature (200–600 °C) were analyzed using impedance spectroscopic technique in different atmospheres (synthetic air, 3000 ppm NH3 in argon, 10% H2 in argon). The impedance plane plot shows semicircle arcs at different temperatures and electrical equivalent circuit have been proposed to analyze the impedance results. Basing on comparison of the spectra in different atmospheres the reactions on the three-phase boundaries were proposed as well as the conduction mechanisms of the electrolytes were described. The material based on ceria is mixed ionic-electronic conductor, while in zirconia-based materials electrical conduction is realized by oxygen ion carriers. The electrochemical properties of the powders were compared from the applicative point of view as a candidate for element in fuel cells and gas sensors.

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Electrochemical Impedance Spectroscopy Study of Ceria- and Zirconia-Based Solid Electrolytes for Application Purposes in Fuel Cells and Gas Sensors

Dziubaniuk,

Piech,

Paczosa-Bator

2024

Materials

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In this study, the structural and electrochemical properties of commercial powders of the nominal compositions Ce0.8Gd0.2O1.9, Sc0.1Ce0.01Zr0.89O1.95, and Sc0.09Yb0.01Zr0.9O1.95 were investigated. The materials are prospective candidates to be used in electrochemical devices, i.e., gas sensors and fuel cells. Based on a comparison of the EIS spectra in different atmospheres (synthetic air, 3000 ppm NH3 in argon, 10% H2 in argon), the reactions on the three-phase boundaries were proposed, as well as the conduction mechanisms of the electrolytes were described. The Ce0.8Gd0.2O1.9 material is a mixed ionic–electronic conductor, which makes it suitable for anode material in fuel cells. Moreover, it exhibits an apparent and reversible response for ammonia, indicating the possibility of usage as an NH3 gas-sensing element. In zirconia-based materials, electrical conduction is realized by oxygen ion carriers. Among them, the most promising from an applicative point of view seems to be Sc0.09Yb0.01Zr0.9O1.95, showing a high, reversible reaction with hydrogen.

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Sc3+:Ce4+:Y3+ doped zirconia nanopowders (ScCeYSZ): Synthesis, thermal phase stability and hot corrosion behavior of spark plasma sintered body

Cited by 3 publications

References 61 publications

CMAS corrosion resistance of scandia, ceria, yttria‐stabilized zirconia ceramic

CMAS corrosion resistance of scandia, ceria, yttria‐stabilized zirconia ceramic

The explanation of electrical properties changes under NH3 and H2 containing atmospheres in risen temperatures of ceria- and zirconia-based solid electrolytes by means of electrochemical impedance spectroscopy

Electrochemical Impedance Spectroscopy Study of Ceria- and Zirconia-Based Solid Electrolytes for Application Purposes in Fuel Cells and Gas Sensors

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