ELECTROLYTE PROTON-CONDUCTIVE MATERIALS FOR PROTONIC CERAMIC FUEL CELLS (PCFCS)

摘要

Two groups of proton conducting ceramic materials have been synthesized. The first one consisted of stoichiometric ACe_(0.85)M_(0.15)O_(3-α), where A is Ba and M is Ga and In. The second group included yttrium doped barium zirconates (BZY) of the general formula BaZr_(1-x)Y_xO_(3-δ), where x=0.2, and δ=x/2. Both groups of materials were processed using glycine nitrate methods, followed by a variation on the Pechini process. X-ray diffraction patterns of these materials agree with existing patterns in the ADAMA database. SEM images were made for both groups, revealing a dense ceramic structure for BaCe_(0.85)In_(0.15)O_(3-α) (BCI) and non uniform grain sizes for BaCe_(0.85)Ga_(0.15)O_(3-α) (BCG). SEM images for the yttrium doped barium zirconates reveal a structure more porous than that of the barium cerates. X-ray diffraction patterns of the yttrium doped barium zirconate material was in correlation with existing patterns from the database.