The paper’s aim was to prepare and characterize ceramic powders of fully stabilized zirconia (with 8 mol% yttria), and alumina, obtained through co-precipitation starting from the corresponding chlorides. Co-precipitation was taken using water or ethanol as a solvent and considering the pH influence (7.5, 10.5 and 12.5 obtained by using ammonia solution) upon precipitation was analyzed. The obtained powders were dried at 80 °C for 24 h and afterwards calcinated at 350°C for 2 hours.
The powders were evaluated through thermal analysis, X-ray diffraction, scanning electron microscopy and transmission electron microscopy.
The XRD results show that 8YSZ calcinated powders is a tetragonal ZrO2 and, concerning alumina powder, besides g-Al2O3, d-Al2O3 was identified. The TEM examination shows that the tetragonal ZrO2 has a spherical like morphology with a size ranging from 5 nm to 12 nm. Also, it was observed that the best condition for nanopowders obtaining was using as solvent water and a
pH value of 12.5.