Production of Uvarovite Ceramic Pigments Using Granulated Blast-Furnace Slag

Resumo

The conditions for obtaining and the rules for changing the color indices of ceramic pigments in the system CaO–MgO–Al₂O₃–SiO₂–Cr₂O₃ are established. The main phase of such pigments is chromium garnet, formed with the direct participation of blast-furnace slag minerals. It is shown that as the acidity of pigment batches is increased by equimolecular substitution of free silicon dioxide in their composition based on phosphorus oxide (V) the purity and intensity of the green color of uvarovite pigments intensifies and the firing temperature of the pigments increases to 1100 – 1150°C.