Abstract
Almost single-phase 8% Ni-doped alumina compositions were derived, by the sol-get method, from both organic and aqueous media. Thermal analysis, XRD, and FT-IR showed that the use of metal organic precursors, and working in an almost fully organic medium, is more advantageous. In these conditions, Ni-doped gamma-alumina could be obtained at a relatively lower temperature. 500 degreesC, than in case of working in an aqueous medium where a delta-alumina phase was formed at temperatures not lower than 600 degreesC. The method of preparation did not alter the desired metal ratio as checked by atomic absorption spectroscopy.