Organic-Ligand-Assisted Solvothermal Synthesis of Nano Dispersed Cobalt-Aluminate Spinel

Cobalt aluminate spinel(CoAl2O4) is one the most famous pigments because of their bright blue color which is well known as Thenards blue. CoAl2O4 spinel is also thermally and chemically stable pigment of vivid blue color, which has received the limelight as a ceramic pigment. For this reason, the pigment is widely used in coloring toner, cosmetic, glasses, glazes, and plastics. We tried to develop organic-ligand-assisted solvothermal synthesis of CoAl2O4 spinel. Here, we report a cobalt aluminate spinel nanopigment capped with organic ligand which prevents efficiently the particle growth and also make particle size possible homo-geneous.