Synthesis of Yttria-Doped Bi2o3 Nanopowders Via Sol Gel Used in Electrolyte of Solid Oxide Fuel Cell

Abstract : Oxide ion conductors have been studied for many years because of their application in devices with high economical interest such as solid oxide fuel cells, oxygen sensors , dense ceramic membranes for oxygen separation. In this paper nanopowders were synthesized via sol gel method. The sintering temperature to complete phase transition are above 500˚c. As-prepared yttria doped Bi2O3 nanocrystals were characterized by X-ray diffraction (XRD) and transmission electron microscope (TEM). Transmission electron microscope (TEM) investigations revealed that the average particle size is less than 30 nm for these powders. It's worth noting that results show a good agreement of both methods. The morphology of the powders were observed on Field Emission scanning electron microscope (FESEM). Ionic conductivity measured by AC impedance spectroscopy.