PREPARATION AND CHARACTERISATION OF 10 MOL% Gd DOPED CeO2 (GDC) ELECTROLYTE FOR SOFC APPLICATIONS

Fully dense CeO2 ceramics doped with 10 mol% gadolinium (Gd0.1Ce0.9O1.95, GDC) were prepared by the Pechini method. A single phase fluorite-type structure formed at a relatively low calcination temperature of 500 C. Dense GDC pellets with 98% relative density were obtained after sintering at 1400 C...

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Bibliographic Details
Published in:Ceramics international 2012-01, Vol.38 (8), p.6509-6515
Main Authors: Arabaci, A, Oksuzomer, M F
Format: Article
Language:English
Subjects:
Ceramics
Density
Electrolytes
Gadolinium
Ionic conductivity
Pellets
Sinterability
Solid oxide fuel cells
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Summary:Fully dense CeO2 ceramics doped with 10 mol% gadolinium (Gd0.1Ce0.9O1.95, GDC) were prepared by the Pechini method. A single phase fluorite-type structure formed at a relatively low calcination temperature of 500 C. Dense GDC pellets with 98% relative density were obtained after sintering at 1400 C for 6 h, giving a higher total ionic conductivity of 3.4 x 10 exp(-2) S/cm at 500 C in air. It was shown that the Pechini method is a relatively low-temperature preparation technique to synthesise Gd0.1Ce0.9O1.95 powders with high sinterability and good ionic conductivity.
ISSN:0272-8842
DOI:10.1016/j.ceramint.2012.05.030