COMPARISON BETWEEN CeO2 BUFFER LAYER FILM FORMED BY CHEMICAL SOLUTION DEPOSITION IN THE PRESENCE OF DIFFERENT ORGANIC ADDITIVES

Abstract

Chemical solution deposition (CSD) derived cerium oxide (CeO₂) films were successfully produced on rolling assisted biaxially textured (100) <001>Ni. In here, the surface of the Ni was first treated with NaOH to see the possibility of improving adherence of the solution to the Ni. Furthermore, different organic additives added solution were experimented and the dip coated precursor films were heat treated at 1000 °C for 1 hour under a reducing atmosphere by flowing Ar-5% H₂ gas. Scanning electron microscopy (SEM) analysis showed surface oxide consisting of both solutions added with triton X-100 and polyvinyl alcohol (PVA) respectively were able to improve the quality of films. A denser film can be produced by adding glacial acetic acid in the triton-X 100 added solution. On the other hand, triethanolamine (TEA) did not help in producing a good coverage and smooth surface of CeO₂ film. Instead the films were cracked and parts of them delaminated from the substrate. X-ray diffraction (XRD) pattern indicated that both (111) and (200) CeO₂ were formed. Raman spectra analysis confirmed the formation of pure phase CeO₂.