Characterization, electrical conduction and stability of Yb-doped barium cerate prepared by sol–gel method

Ceramics powder of BaCe 0.95 Yb 0.05 O 2.975 was successfully prepared by sol–gel method. Thermogravimetric analysis showed that the decomposition of the dried powder was completed at 1,000 °C. Three strongly exothermic peaks observed in differential thermogravimetric signal indicated three major st...

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Bibliographic Details
Published in:Ionics 2008-09, Vol.14 (5), p.407-413
Main Authors: Osman, N., Talib, I. A., Hamid, H. A., Jani, A. M.
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Condensed Matter Physics
Electrochemistry
Energy Storage
Optical and Electronic Materials
Original Paper
Renewable and Green Energy
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Summary:Ceramics powder of BaCe 0.95 Yb 0.05 O 2.975 was successfully prepared by sol–gel method. Thermogravimetric analysis showed that the decomposition of the dried powder was completed at 1,000 °C. Three strongly exothermic peaks observed in differential thermogravimetric signal indicated three major stages of weight loss in the sample. The high crystallinity of sample with orthorhombic structure was confirmed by X-ray diffraction. The loose particles size obtained from scanning electron microscope was in the range of 65–100 nm, which is almost in the same range as that observed in particle size distribution. The sample showed a dc conductivity of ~1.3 × 10 −4  S cm −1 at 650 °C and the activation energy, E a , was found to be 1.4 eV. Result of chemical stability test showed that the compound was unstable in atmosphere containing pure carbon dioxide.
ISSN:0947-7047
1862-0760
DOI:10.1007/s11581-007-0184-x