PREPARATION OF FERRIC TITANATES FOR TEMPERATURE-STABLE INORGANIC YELLOW PIGMENTS

摘要

A temperature-stable inorganic yellow pigment of the composition Fe2TiO5 . x TiO2, where x is from 0 to about 15, with a particle diameter of less than about 1 micron is produced by forming an aqueous suspension of at least one finely divided iron compound selected from the group consisting of iron oxide, iron oxide hydroxide, iron hydroxide and iron carbonate and at least one finely divided titanium compound selected from the group consisting of titanium dioxide and titanium dioxide oxide hydrate, the iron and titanium compounds being present in accordance with the stoichiometric composition Fe2TiO5 . x TiO2 where x is from 0 to 15, removing the aqueous phase from the mixed suspension, and calcining the residue at a temperature from about 600.degree.C to 1100.degree.C.