Synthesis and coloring properties of a novel Na2NiMn2O6 black ceramic pigment

Currently black pigments face challenges of non-ideal luminance factor (L-value), and the presence of potentially hazardous cobalt (Co). A novel stable Na 2 NiMn 2 O 6 (NNMO) black pigment is reported in this work. The pigment exhibits excellent properties, including an ideal low L-value, Co-free composition, and stable bright black hue. A range of analytical techniques are employed to evaluate the properties of the novel pigment, including XRD, SEM, EDS-Mapping, XPS, UV–V is , and CIELAB colorimetry. The chromaticity parameters of the black pigment are L∗ = 24.39, a∗ = 0.21, and b∗ = 0.39. The bright black color of the pigment and the glazing sample was attributed to the combined contributions of Ni 2+ and Mn 3+ /Mn 4+ in the Na 2 NiMn 2 O 6 pigment and NiMnO 3 , Na 4 Mn 9 O 18 , Mn 2 O 3 ingredients in the glazing sample. This research offering valuable guidance for the development of novel, Co-free, and low L-value black pigment.