The novel two-step synthesis method decreasing
the calcining temperature necessary for formation of spinel lattice and as
well for reaching of bright and clear hue of the pigments prepared were investigated.
This work aims to utilization of DTA for synthesis monitoring. Influence of
raw materials and temperature of calcination on color properties were observed.
The characterization of the samples was performed by X-ray diffraction and
colorimetry in the CIE L*a*b* system. It
was proved that the black spinel pigment Cu2.3Mn2.8Cr4.9Ox can be prepared at finally temperature 700C as one-phase system with
high quality black hue.