Resumen

CHENG, JIHAI et al. PREPARATION OF CE_0.8GD_0.2O_1.9 SOLID ELECTROLYTE BY THE SOL-COMBUSTION METHOD. J. Chil. Chem. Soc. [online]. 2009, vol.54, n.4, pp. 445-447. ISSN 0717-9707.  doi: 10.4067/S0717-97072009000400027.

Ce_0.8Gd_0.2O_1.9 (GDC) powders were prepared by a novel sol-combustion method using citric acid as the chelating reagent. The effects of different sintering temperatures were investigated on the evolution of crystalline phase, particle size, and lattice parameters of the resulted GDC powders. The results have shown that ultrafne GDC powders of around 40nm in diameter were successfully prepared by the sol-combustion technique. The powders showed a high sinterability, and a relative of 95.2% of the theoretical density was obtained at a sintering temperature of 1250^oC. Electrochemistry measurements showed that the GDC ceramics had relatively high oxygen ionic conductivity in low-temperature range.

Palabras clave : SOFC; Doped CeO₂; Electrical conductivity; Sol-combustion method; Electrolyte.