PIGMENTOS DE INCLUSAO DE COR NEGRO-CINZA E PROCESSO PARA A SUA PRODUCAO

摘要

Grey-black inclusion pigments are obtained by enclosing iron titanates of the formula FeTiO3 in zirconium silicate crystals. They are prepared by igniting a mixture of zirconium oxide having a particle size distribution of 6 to 10  mu m and a specific surface area of 2 to 5.2 m<2>/g, silica and iron oxides and titanium oxides or iron compounds and titanium compounds forming oxides in the presence of mineralisers under oxidising conditions at 800 to 1300 DEG C.