Subsolidus phase equilibria in the RuO2–Bi2O3–CeO2 system

2003 ◽  
Vol 18 (6) ◽  
pp. 1297-1300 ◽  
Author(s):  
Marko Hrovat ◽  
Andreja Benčan ◽  
Janez Holc ◽  
Tadej Rojac ◽  
Marija Kosec
Keyword(s):  
Solid Solution ◽  
Phase Equilibria ◽  
Solid Oxide Fuel Cells ◽  
Solid Electrolyte ◽  
Solid Solubility ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Subsolidus Phase ◽  
Fluorite Solid Solution ◽  
Tie Line

Subsolidus equilibria in air in the RuO2–Bi2O3–CeO2 systems were studied with the aim of obtaining information on possible interactions between a Bi2Ru2O7-based cathode and a CeO2-based solid electrolyte in solid-oxide fuel cells. Bi2O3 is soluble in CeO2, and forms a cubic fluorite solid solution Bi1-xCexO2-x/2 up to Bi1/3Ce2/3O1.83, while no solid solubility of the CeO2 in Bi2O3 was detected. No ternary compound was found in the system. The tie line is between Bi2Ru2O7 and the CeO2 solid solution.

Subsolidus phase equilibria in the La2O3−CeO2−Co2O3 system

1999 ◽  
Vol 14 (5) ◽  
pp. 1692-1694 ◽  
Author(s):  
Marko Hrovat ◽  
Janez Holc ◽  
Slavko Bernik
Keyword(s):  
Fuel Cells ◽  
Phase Equilibria ◽  
Solid Oxide Fuel Cells ◽  
Solid Electrolyte ◽  
Ternary Compound ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Subsolidus Phase ◽  
Tie Line

Subsolidus equilibria in air in the La2O3−CeO2−Co2O3 system were studied with the aim to obtain information on possible interactions between LaCoO3-based cathode and CeO2-based solid electrolyte in solid oxide fuel cells (SOFC). No ternary compound was found. The tie line is between LaCoO3 and CeO2.

Subsolidus phase equilibria in the La2O3–Ga2O3–CeO2 system

1999 ◽  
Vol 14 (12) ◽  
pp. 4460-4462 ◽  
Author(s):  
Marko Hrovat ◽  
Zoran Samardžzija ◽  
Janez Holc ◽  
Slavko Bernik
Keyword(s):  
Solid Solution ◽  
Phase Equilibria ◽  
Solid Oxide Fuel Cells ◽  
Solid Electrolyte ◽  
Solid Solutions ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Subsolidus Phase ◽  
Solid Solution Range ◽  
Tie Lines

Subsolidus equilibria in air in the La2O3–Ga2O3–CeO2 system were studied with the aim of obtaining information on possible interactions between a LaGaO3-based solid electrolyte and CeO2 during preparation of the anode in solid oxide fuel cells. No ternary compound was found. The tie lines are between La4Ga2O9 and the end of the CeO2 solid solution range with composition La0.5Ce0.5O1.75 and between the LaGaO3 and CeO2 range of solid solutions.

Subsolidus phase equilibria in the La2O3–Ga2O3–NiO system

1999 ◽  
Vol 14 (6) ◽  
pp. 2351-2354 ◽  
Author(s):  
Marko Hrovat ◽  
Slavko Bernik ◽  
Janez Holc ◽  
Zoran Samardžija
Keyword(s):  
Fuel Cells ◽  
Phase Equilibria ◽  
Solid Oxide Fuel Cells ◽  
Solid Electrolyte ◽  
Ternary Compound ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Subsolidus Phase ◽  
Tie Lines

Subsolidus equilibria in air in the La2O3–Ga2O3–NiO system were studied with the aim of obtaining information on possible interactions between a LaGaO3-based solid electrolyte and NiO during preparation of the anode in solid oxide fuel cells (SOFC). No ternary compound was found. The tie lines are between La4Ga2O7 and La2NiO4, LaGaO3 and La2NiO4, LaGaO3 and NiO, and LaGaO3 and NiGa2O4.

An anode for solid oxide fuel cells: NiO+(Ce0.9Ca0.1O1.9)0.25(YSZ)0.75 solid solution

2003 ◽  
Vol 360 (1-2) ◽  
pp. 294-297 ◽  
Author(s):  
Xiqiang Huang ◽  
Zhe Lu ◽  
Li Pei ◽  
Zhiguo Liu ◽  
Yuqiang Liu ◽  
...  
Keyword(s):  
Solid Solution ◽  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Solid Oxide ◽  
Oxide Fuel

Some Structural Aspects of Ionic Conductivity in Co-Doped Ceria-Based Electrolytes

2013 ◽  
Vol 58 (4) ◽  
pp. 1355-1359 ◽  
Author(s):  
M. Dudek
Keyword(s):  
Solid Solution ◽  
Chemical Composition ◽  
Ionic Conductivity ◽  
Solid Oxide Fuel Cells ◽  
Solid Solutions ◽  
Transference Number ◽  
Solid Oxide ◽  
Doped Ceria ◽  
Oxide Fuel ◽  
Co Doped

Abstract The sinters of co-doped ceria solid solutions with the formula of Ce0.85Sm0.15-x RxO1.9, where R = Y, Gd, Pr, Tb, Ox-0.15, were obtained from powders synthesised by Pechini method. The linear variation of cell parameter a vs. chemical composition was observed for Ce0.85Sm0:15-xRxO1.9, where R = Y, Gd, Tb, 0 <x<0.15 samples. However, the introduction of Pr3+ into Ce0.85Sm0.15-x PrxO1.9 caused a small deviation from linearity due to possible changes in the valence from Pr3+ to Pr4+. The determined values of oxide transference number tion for Ce0.85Sm0.15-xRxO1.9, R = Y, Gd in the temperature range 400-750°C and partial oxygen pressure from 10-6 to 1 atm were close to 1, which indicated that materials investigated exhibited practically pure ionic oxide conductivity. On the other hand, the introduction of Tb3+ or Pr3+ higher than x>0.05 into solid solution Ce0.85Sm0.15-xRxO1.9, R = Tb, Pr caused a decrease in the ionic transference number tion below 1 due to an increase in partial electronic conduction. This fact limiting investigated co-doped terbia and samaria or samaria and praseodymia ceria-based solid solutions for the further application as oxide electrolytes in solid oxide fuel cells. The analysis of bulk and grain boundary values indicated that partial substitution of Sm3+ by Y3+ or Gd3+ caused slight improvements in the ionic conductivity of Ce0.85Sm0.15-xRxO1.9. The highest ionic conductivity was found for solid solution with chemical composition Ce0.85Sm0.1Y0.05O1.9. The selected co-doped ceria samples were tested as solid electrolytes in solid oxide fuel cells operating in the intermediate temperature range 500-750°C.

scholarly journals LSO apatite-YSZ composite as a solid electrolyte for solid oxide fuel cells

2017 ◽  
Author(s):  
Atiek Rostika Noviyanti ◽  
Iwan Hastiawan ◽  
Yati. B. Yuliyati ◽  
Iman Rahayu ◽  
Desy Rosyani ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Solid Electrolyte ◽  
Solid Oxide ◽  
Oxide Fuel
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