Synthesis and Characterization of BaCe{sub}0.8Y{sub}0.2O{sub}2.9 Nanopowder by Sol-Gel Auto-Ignited Method

摘要

A sol-gel auto-ignited synthesis, which is a hybrid of sol-gel and auto-ignited techniques, was applied to preparation of homogeneous and stoichiometric BaCe{sub}0.8Y{sub}0.2O{sub}2.9 nanocrystalline ceramic powder as solid electrolyte used in solid oxide fuel cells at 1000°C. Optimal pH value for the mixed citrate-nitrate solutions was determined by calculation. The DTA-TG and XRD were used to investigate the thermal decomposition of the gel precursor. The structure and phase present of the nanocrystalline BaCe{sub}0.8Y{sub}0.2O{sub}2.9 powders were characterized by XRD, BET and SEM techniques.