Ceramic Pigments for Producing Black Glazes

A new black-color ceramic pigment has been developed on the basis of the CoO - Fe2O3 system under a decreased temperature of synthesis (1000 - 1200°C). The optimum temperature range of the spinel-forming reaction in the specified oxide system is determined. When the obtained pigment is introduced into raw glaze for sanitary ceramics in milling, the resulting glaze coatings have intense and stable black color within a sufficiently wide interval of firing temperatures.