کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1462422 | 989631 | 2012 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Preparation and characterization of 10 mol% Gd doped CeO2 (GDC) electrolyte for SOFC applications Preparation and characterization of 10 mol% Gd doped CeO2 (GDC) electrolyte for SOFC applications](/preview/png/1462422.png)
Ceria-based materials are prospective electrolytes for low and intermediate temperature solid oxide fuel cells. In the present work, fully dense CeO2 ceramics doped with 10 mol% gadolinium (Gd0.1Ce0.9O1.95, GDC) have been prepared with a Pechini method. Characterization studies were realized with thermo-gravimetric analysis (TGA), differential thermal analysis (DTA), mass spectroscopy (MS), high temperature FT-IR (HT-FTIR) and X-ray diffraction analysis (XRD). A single-phase with a fluorite type structure was found to form at a relatively low calcination temperature of 500 °C. Dense GDC pellets having 98% of the relative density were obtained at sintering temperature of 1400 °C/6 h, which gave significantly higher total ionic conductivity of 3.4×10−2 S cm−1 at 500 °C in air. The present work showed that the Pechini method is a relatively low-temperature preparation technique to synthesize Gd0.1Ce0.9O1.95 powders that provided high sinterability and good ionic conductivity.
Journal: Ceramics International - Volume 38, Issue 8, December 2012, Pages 6509–6515