Synthesis and Characterization of Orange Pigments from Rare Earth Metal Ions

New inorganic pigments were synthesized through calcination route with advantages such as the ability to prepare homogeneous oxidesof lower size, which could provide for higher surface coverage. The synthesized inorganic pigments were characterized by varioustechniques like infrared, UV-visible spectroscopy and diffuse reflectance spectroscopy (DRS) using CIE - L*a*b* parameters method forcolour measurements. The above characterized inorganic pigments were used for the study of the pigments of associated ions. Solid statereactions of these metal ions with transition metal ions like chromium, molybdenum, manganese and iron were carried out individually.A replacement for cadmium, cobalt, lead and mercury based pigments has been sought through the use of rare earth metal ions – ceriumand lanthanum. It was found that cerium offered better scope for doping than lanthanum as it produced better shades. Multiple dopingplays a vital role in increasing the mass tone and tint strength.