Abstract
Iron oxide-doped ceria Ce1-yFeyO2-δ (where y=0, 0.01, 0.05, 0.10, and 0.20) and iron oxide-doped ceria-zirconia ZrxCe0.95-xFe0.05O2-δ (where x=0, 0.20, 0.40, 0.60, 0.80, and 0.95) powder samples were synthesized by a coprecipitation method and heated at 900℃ and 1230℃. The samples were characterized by XRD, colorimetric assessment and UV-Vis diffuse reflectance spectroscopy. Furthermore, the color glazes obtained by adding the samples to the basic glaze were heated at 1230℃ in air, and evaluated by colorimetric assessment. X-ray diffraction data revealed that Ce1-yFeyO2-δ samples with y ≥ 0.05 were composed of Fe-doped CeO2 solid solution and Fe2O3. The powders of Ce1-yFeyO2-δ showed dark red color and the glazes containing them also showed yellowish red color. In Fe-doped ceria zirconia samples heated at 900℃, the red color varied to orange and yellow with increasing x in ZrxCe0.95-xFe0.05O2-δ. However, the glazes containing them (with Zr) changed from warm color into pale like celadon. These warm colored materials show high durability against high temperature and environmental friendly properties, so the application as ceramic pigments can be expected.
