Utilization of ferrochromium fly ash as a pigment raw material in stoneware glaze and underglaze decoration

It is known that ceramic pigments are used for colouring and decorating of the traditional ceramic body and glaze. Colour in glaze is developed through the use of metal oxides, carbonates, sulphates, nitrates and chlorides. They may be used singly or intermixed with other raw materials, colorant or opacifiers. On the other hand, conventional ceramic raw materials such as clay, silica and alumina also are used in pigment formulations. The raw materials are weighed in accordance with recipes, mixed and ground into certain particle fineness.