Modified spinel-cobalt blue pigments and research progress

The structure and preparation methods of spinel cobalt blue pigments,including solide phase,liquid phase and gaseous phase processes were introduced.The effects of different iron-doping methods on the structure and properties of modified cobalt blue pigments were investigated with XRD,SEM techniques.Bivalent cation-doping influenced the lattice constant of the pigments in agreement with the law of Vegard.Tribalent cation-doping had an obvious influence on the tone of the pigments.Finally the development of cobalt blue pigments in terms of preparation methods and iron-doping was forecasted.