Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1491755 | Materials Research Bulletin | 2006 | 8 Pages |
Abstract
Ce1âxGdxO2â1/2x nanopowder were successfully synthesized by microwave-induced combustion process. For the preparation, cerium nitrate, gadolinium nitrate hexahydrate, and urea were used for the microwave-induced combustion process. The process took only 30 min to obtain Ce1âxGdxO2â1/2x powders. The exo-endo temperature, phase identification, and morphology of resultant powders were investigated by TG/DTA, XRD, and SEM. The as-received Ce1âxGdxO2â1/2x powders showed that the average particle size ranged from 18 to 50 nm, crystallite dimension varied from 11 to 20 nm, and the specific surface area was distribution from 16 to 46 m2/g. As for Ce1âxGdxO2â1/2x ceramics sintered at 1450 °C for 3 h, the bulk density of Ce1âxGdxO2â1/2x ceramics were over 91% of the theoretical density, the maximum electrical conductivity, Ï700 °C = 0.017 S/cm with minimum activation energy, Ea = 0.869 eV was found at Ce0.80Gd0.20O1.90 ceramic.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Yen-Pei Fu, Yen-Shao Chang, Shaw-Bing Wen,