Synthesis of (Y,Er) 2 O 3 Films from Multiple-Nuclei EDTA·(Y,Er)·H Complexes by Flame Spray Method

In this investigation, rare earth metal oxide films were synthesized from metal complexes of ethylenediaminetetraacetic acid (metal-EDTA) by utilizing a flame spray technique. Two raw metal-EDTA powders were prepared as starting materials in order to synthesize (Y,Er)(2)O-3 films on stainless steel (SUS) substrates by a reaction that is promoted by the combustion of gaseous H-2-O-2. Molecularly mixed EDTA center dot(Y,Er)center dot H and mechanically mixed EDTA center dot Y center dot H + EDTA center dot Er center dot H complexes were subsequently prepared. The existence of Y2O3 and Er2O3 crystalline phases was confirmed for the EDTA center dot Y center dot H + EDTA center dot Er center dot H mixtures. Lamellar structures were formed on the film with a porosity of 9.5%. Alternatively, a homogenous, (Y,Er)(2)O-3 film was obtained from the EDTA center dot(Y,Er)center dot H complex, with a film porosity of 31.8%. These results indicate that uniform (Y,Er)(2)O-3 films were synthesized on SUS substrates from molecularly mixed EDTA center dot(Y,Er)center dot H powders.