Hydrothermal Synthesis and Properties of CE_(1-x)M_xO_(2-#delta#) Solid Solutions

摘要

A systematic study of hydrothermally prepared Ce_(1-x)M_xO_(2-#delta#) solid solutions, promising materials for application in solid oxide fuel cells and oxygen membranes is presented. ultrafine particles of uniform crystallite dimension, ~20 nm can be formed in 30 min. under hydrothermal conditions. The small particle size of the hydrothermally prepared materials allows sintering ofthe sampels inot highly dense ceramics aat 900-1350 deg C, significantly lower temperatures than 1600-1650 deg C required for samples prepared by solid state techniques. The solubility limit of BI_2O_3 in CeO_2 was determined to be around 20 mol.