Preparation and Reflectance Spectrum Modulation of Cr(2)O(3) Green Pigment by Solution Combustion Synthesis

An amorphous precursor of Cr(2)O(3) pigment was prepared via solution combustion synthesis. After calcination at 1000 °C for 1.0 h, the precursor was converted into well-crystallized submicron Cr(2)O(3) crystals with uniform particle distribution and low aggregation. Furthermore, Ti, Co, and Fe were doped into the lattice of Cr(2)O(3), and the effects of these dopants on the reflectance spectroscopy modulation as well as chromatic properties were investigated in detail. As a result, a series of Cr(2)O(3) pigment samples sharing similar spectra within the wavelength from 400 to 1600 nm with green plants could be successfully fabricated.