Abstract
This work aimed to synthesize (LnAlO3, Ln=La, Pr, Nd) lanthanide aluminates with perovskite structure in order to study their application as ceramic pigments. Effects of the lanthanide ions on the color properties of the powders were evaluated. Perovskites were synthesized by a method, which makes uses of gelatin as an organic precursor and thermally treated at 800 and 1000°C for 4h. The resulting powders were characterized using thermal analysis, X-ray diffraction, scanning electron microscopy, UV–visible diffuse reflectance spectroscopy and CIELab colorimetry. The calcined powders were single-phase and exhibited a well-developed rhombohedral perovskites structure. Pigments presented high percentage of reflectance and a light violet color. The crystal field transitions of lanthanide ions were the only source of colors of the pigments.
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