The structural and optical studies of titanium doped rare earth pigments and coloring applications

摘要

Structural and optical investigations were performed on solid-state synthesized Pr2MoO6 doped with titanium at different compositions with a goal of preparing environmentally secure yellow pigments as alternate to classical toxic inorganic pigments. The systematic substitution of Pr~(3+) for Ti~(4+) in Pr2MoO6 matrix helps the band gap tuning of the pigment which results in the change of color from yellow to greenish-yellow and the band gap changes from 2.17 eV to 2.31 eV. The typically designed pigment samples have been evaluated for their mass tone/hiding power. The coloring performance of the developed yellow Pr2MoO6 pigment was evaluated by incorporating it into a polymer substrate material. The ceramic pigments obtained have been found to be interesting alternatives to the existing classical toxic inorganic pigments for applications on surface coating and coloring of plastics.