(TiO_2)_1(CeO_2)_(1-x)(RE_2O_3)_x - novel environmental secure pigments

摘要

This paper embodies the results of the investigations carried out on the synthesis of titania - rare earth mixed oxide pigments: (TiO_2)_1 (CeO_2)_(1-x) (RE_2O_3)_x,where RE = Y,Pr,Nd or Sm with nominal compositions: x = 0.2 and 0.8 and their characterization by X-ray powder diffraction,scanning electron microscopy,energy dispersive spectrometric analysis and reflectance spectral data.The synthesized pigment samples are having color coordinates,low a and high b and exhibit the colors ranging from yellow to orange-red.The dominant reflectance of these colorants lies in the wavelength region of 600-800 nm.Among the various colorants prepared,Y and Sm doped pigments are found to be promising candidates as ecological pigments because of their high reflectance,lightness and intense coloration.