scholarly journals Destabilization of Yttria‐Stabilized Zirconia Induced by Molten Sodium Vanadate‐Sodium Sulfate Melts

1985 ◽  
Vol 132 (10) ◽  
pp. 2502-2507 ◽  
Author(s):  
A. S. Nagelberg
Keyword(s):  
Sodium Sulfate ◽  
Yttria Stabilized Zirconia ◽  
Sodium Vanadate ◽  
Stabilized Zirconia ◽  
Molten Sodium

Molten sodium corrosion of laser surface remelted yttria-stabilized zirconia thermal barrier coatings

2021 ◽  
pp. 109740
Author(s):  
Paulson Varghese ◽  
E. Vetrivendan ◽  
B.R. Vaishnavi Krupa ◽  
Prabhat Kumar Shukla ◽  
Ram Kishor Gupta ◽  
...  
Keyword(s):  
Thermal Barrier Coatings ◽  
Laser Surface ◽  
Yttria Stabilized Zirconia ◽  
Thermal Barrier ◽  
Stabilized Zirconia ◽  
Barrier Coatings ◽  
Molten Sodium

Microstructural examination of modified yttria stabilized zirconia by EM analytical techniques

1986 ◽  
Vol 44 ◽  
pp. 842-843
Author(s):  
W. W. Davison ◽  
R. C. Buchanan
Keyword(s):  
Mechanical Properties ◽  
Analytical Techniques ◽  
Yttria Stabilized Zirconia ◽  
Stabilized Zirconia ◽  
Transmission Microscopy ◽  
Sintering Aid ◽  
Densification Temperature ◽  
Chemical Inertness ◽  
Scanning Transmission ◽  
Microstructural Examination

Yttria stabilized zirconia (YSZ) has become a significant technological material due to its high ionic conductivity, chemical inertness, and good mechanical properties. Temperatures on the order of 1700°C are required, however, to densify YSZ to the degree necessary for good electrical and mechanical properties. A technique for lowering the densification temperature is the addition of small amounts of material which facilitate the formation of a liquid phase at comparatively low temperatures. In this study, sintered microstructures obtained from the use of Al2O3 as a sintering aid were examined with scanning, transmission, and scanning transmission microscopy (SEM, TEM, and STEM).

Characterizations of Synthetic 8mol% YSZ with Comparison to 3mol %YSZ for HT-SOFC

2020 ◽  
Vol 38 (4A) ◽  
pp. 491-500
Author(s):  
Abeer F. Al-Attar ◽  
Saad B. H. Farid ◽  
Fadhil A. Hashim
Keyword(s):  
Ionic Conductivity ◽  
Electrochemical Impedance ◽  
Structural Information ◽  
Impedance Analysis ◽  
High Energy ◽  
Yttria Stabilized Zirconia ◽  
X Ray Diffraction ◽  
Stabilized Zirconia ◽  
Powder Morphology ◽  
X Ray

In this work, Yttria (Y2O3) was successfully doped into tetragonal 3mol% yttria stabilized Zirconia (3YSZ) by high energy-mechanical milling to synthesize 8mol% yttria stabilized Zirconia (8YSZ) used as an electrolyte for high temperature solid oxide fuel cells (HT-SOFC). This work aims to evaluate the densification and ionic conductivity of the sintered electrolytes at 1650°C. The bulk density was measured according to ASTM C373-17. The powder morphology and the microstructure of the sintered electrolytes were analyzed via Field Emission Scanning Electron Microscopy (FESEM). The chemical analysis was obtained with Energy-dispersive X-ray spectroscopy (EDS). Also, X-ray diffraction (XRD) was used to obtain structural information of the starting materials and the sintered electrolytes. The ionic conductivity was obtained through electrochemical impedance spectroscopy (EIS) in the air as a function of temperatures at a frequency range of 100(mHz)-100(kHz). It is found that the 3YSZ has a higher density than the 8YSZ. The impedance analysis showed that the ionic conductivity of the prepared 8YSZ at 800°C is0.906 (S.cm) and it was 0.214(S.cm) of the 3YSZ. Besides, 8YSZ has a lower activation energy 0.774(eV) than that of the 3YSZ 0.901(eV). Thus, the prepared 8YSZ can be nominated as an electrolyte for the HT-SOFC.

Spectroscopic investigation of the electronic structure of yttria-stabilized zirconia

2018 ◽  
Vol 2 (3) ◽  
Author(s):  
Thomas Götsch ◽  
Erminald Bertel ◽  
Alexander Menzel ◽  
Michael Stöger-Pollach ◽  
Simon Penner
Keyword(s):  
Electronic Structure ◽  
Spectroscopic Investigation ◽  
Yttria Stabilized Zirconia ◽  
Stabilized Zirconia
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